Adding basic help, fixing obvious bugs.

This release is a first step to get the module under control.
Changes:

1. Fixed bugs:

• Issue #8 (missing mandatory attribute on some parameters)
• Issue #9 (mistakes in $Email parameter handling)

2. New structure in the module:

• psm1 file with dot-sourcing plus individual files for each function
• help moved to external help, generated with platsyPS

3. Help added:

• just functions
• very basic, without drilling into details of some, more complex commands
• plan to continue tracking this task in the issue #2.