updated requirements

.travis.yml

@@ -11,16 +11,24 @@ addons:
     sources:
     - ubuntu-toolchain-r-test
     packages:
-    - tmux
     - mailutils
     - postfix
+    - curl
+    - wget
+    - file
+    - bzip2
+    - gzip
+    - unzip
+    - bsdmainutils
+    - python
+    - util-linux
+    - ca-certificates
+    - binutils
+    - bc
+    - tmux
     - lib32gcc1
     - libstdc++6
     - libstdc++6:i386
-    - telnet
-    - expect
-    - bc
-    - binutils
 
 script: