Handled exception from cmd_parser
handled InvalidParametersError from cmd_manager
edited to follow the coding style guide
fixed the throw from --all-tags
handled other exceptions
Merge pull request #62 from rakina/master

Exceptions in CLI's main function handled.

Related to issue #45 and Pull Request #62
issue60 : find an empty id instead of incrementing ids
test file
Issue18: API - Unassign tags
Issue18: CLI - unassign tags
Merge branch 'issue60' of https://github.com/hlyassine/tocc into yassine-issue60

Issue #60 and Pull Request #64
Merge pull request #1 from aidin36/master

issue#61