Fix grammar on en & en-us About pages (#4450)

* Fix grammar on en & en-us About pages (#4449)

Restructure sentences to make them grammatically correct.

* Simplify 'freshrss_description' on About page

Remove references to Kriss Feed and Leed.

* Fix grammar on en & en-us About pages

CREDITS.md

@@ -44,6 +44,7 @@ People are sorted by name so please keep this order.
 * [David Souza](https://github.com/araujo0205): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:araujo0205), [Web](http://davidsouza.tech/)
 * [Django Janny](https://github.com/keltroth): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:keltroth)
 * [dswd](https://github.com/dswd): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:dswd)
+* [DuncanBennie](https://github.com/DuncanBennie): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:DuncanBennie), [Web](https://duncanbennie.com)
 * [ealdraed](https://github.com/ealdraed): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:ealdraed)
 * [Ed Sandor](https://github.com/ewsandor): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:ewsandor), [Web](https://ewsandor.com)
 * [equinoxmatt](https://github.com/equinoxmatt): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:equinoxmatt)

app/i18n/en-us/index.php

@@ -16,8 +16,8 @@ return array(
 		'agpl3' => '<a href="https://www.gnu.org/licenses/agpl-3.0.html">AGPL 3</a>',	// IGNORE
 		'bugs_reports' => 'Bug reports',	// IGNORE
 		'credits' => 'Credits',	// IGNORE
-		'credits_content' => 'Some design elements come from <a href="http://twitter.github.io/bootstrap/">Bootstrap</a> although FreshRSS doesn’t use this framework. <a href="https://git.gnome.org/browse/gnome-icon-theme-symbolic">Icons</a> come from <a href="https://www.gnome.org/">GNOME project</a>. <em>Open Sans</em> font police has been created by <a href="https://fonts.google.com/specimen/Open+Sans">Steve Matteson</a>. FreshRSS is based on <a href="https://framagit.org/marienfressinaud/MINZ">Minz</a>, a PHP framework.',	// IGNORE
-		'freshrss_description' => 'FreshRSS is an RSS feed aggregator to self-host like <a href="http://tontof.net/kriss/feed/">Kriss Feed</a> or <a href="https://github.com/LeedRSS/Leed">Leed</a>. It is light and easy to take in hand while being powerful and configurable tool.',	// IGNORE
+		'credits_content' => 'Some design elements come from <a href="http://twitter.github.io/bootstrap/">Bootstrap</a> although FreshRSS doesn’t use this framework. <a href="https://git.gnome.org/browse/gnome-icon-theme-symbolic">Icons</a> come from the <a href="https://www.gnome.org/">GNOME project</a>. <em>Open Sans</em> font police has been created by <a href="https://fonts.google.com/specimen/Open+Sans">Steve Matteson</a>. FreshRSS is based on <a href="https://framagit.org/marienfressinaud/MINZ">Minz</a>, a PHP framework.',	// IGNORE
+		'freshrss_description' => 'FreshRSS is a self-hostable RSS aggregator and reader. It allows you to read and follow several news websites at a glance without the need to browse from one website to another. FreshRSS is lightweight, configurable, and easy to use.',	// IGNORE
 		'github' => '<a href="https://github.com/FreshRSS/FreshRSS/issues">on Github</a>',	// IGNORE
 		'license' => 'License',	// IGNORE
 		'project_website' => 'Project website',	// IGNORE

app/i18n/en/index.php

@@ -16,8 +16,8 @@ return array(
 		'agpl3' => '<a href="https://www.gnu.org/licenses/agpl-3.0.html">AGPL 3</a>',
 		'bugs_reports' => 'Bug reports',
 		'credits' => 'Credits',
-		'credits_content' => 'Some design elements come from <a href="http://twitter.github.io/bootstrap/">Bootstrap</a> although FreshRSS doesn’t use this framework. <a href="https://git.gnome.org/browse/gnome-icon-theme-symbolic">Icons</a> come from <a href="https://www.gnome.org/">GNOME project</a>. <em>Open Sans</em> font police has been created by <a href="https://fonts.google.com/specimen/Open+Sans">Steve Matteson</a>. FreshRSS is based on <a href="https://framagit.org/marienfressinaud/MINZ">Minz</a>, a PHP framework.',
-		'freshrss_description' => 'FreshRSS is an RSS feed aggregator to self-host like <a href="http://tontof.net/kriss/feed/">Kriss Feed</a> or <a href="https://github.com/LeedRSS/Leed">Leed</a>. It is light and easy to take in hand while being powerful and configurable tool.',
+		'credits_content' => 'Some design elements come from <a href="http://twitter.github.io/bootstrap/">Bootstrap</a> although FreshRSS doesn’t use this framework. <a href="https://git.gnome.org/browse/gnome-icon-theme-symbolic">Icons</a> come from the <a href="https://www.gnome.org/">GNOME project</a>. <em>Open Sans</em> font police has been created by <a href="https://fonts.google.com/specimen/Open+Sans">Steve Matteson</a>. FreshRSS is based on <a href="https://framagit.org/marienfressinaud/MINZ">Minz</a>, a PHP framework.',
+		'freshrss_description' => 'FreshRSS is a self-hostable RSS aggregator and reader. It allows you to read and follow several news websites at a glance without the need to browse from one website to another. FreshRSS is lightweight, configurable, and easy to use.',
 		'github' => '<a href="https://github.com/FreshRSS/FreshRSS/issues">on Github</a>',
 		'license' => 'License',
 		'project_website' => 'Project website',