More command help arrives

• A bug where filters not enclosed in quotes could result in panic was fixed.
• The --ip-addresses argument of the network get command is now validated against its possible values and autocompleted accordingly.
• The format of the resource help messages was changed slightly for better readability.
• The help description of the --generate-cli-skelton option was clarified a bit.
• Help was provided for the rest of commands except for server list and group list, which are currently a subject to change.

MD5Sums:
076ba3674a7f2b8d824488d0d5d23e0a clc-2015-08-28-linux-amd64.tar.gz
6ef03b42292f577e936468bed60ab224 clc-2015-08-28-windows-x64.zip