Replaced tabs with spaces.

Also removed trailing spaces.
Added support for making (mod:func ...) calls.
Updated user guide to include new syntax.
Merge pull request #58 from oubiwann/tabs-to-spaces

Replaced tabs with spaces.
Replaced previous support for (mod:func ...).

This one obviates the need to add extra functions and any changes to existing
functions. It simply adds a new exp_predef.
Merge pull request #59 from oubiwann/erl-call-plus

Providing support for (mod:func ...) calls
Improve get-version command