Adds the help about llst args

To display it run `./llst --help`.

Issue: #33
Fixes error: 'unknown type name FILE'

Issue: #45
Merge branches 'feature/33/cli_args' and 'feature/43/cpack_support' into develop

* feature/33/cli_args:
  Adds the help about llst args

* feature/43/cpack_support:
  Adds an empty man for llst
  Fixes a lot of lintian warnings
  Fix LICENSE due to `http://www.debian.org/doc/debian-policy/ch-docs.html#s-copyrightfile`
  Adds `make package`
  Adds `make package_source`

Issue: #33
Issue: #43
Merge branch 'bug/45/arch_compile_readline' into develop

* bug/45/arch_compile_readline:
  Fixes error: 'unknown type name FILE'

Issue: #45
Adds bash completion for llst installed with deb

Issue: #43