Add vasmajversion fact as separate file

This solves a name space issue with legacy module eis_vas.
Add option to create symlink to vastool binary

Default is to create a symlink from /usr/bin/vastool to
/opt/quest/bin/vastool so that it's in the path.
Added new configurable parameters

* lazy-cache-update-interval for compliance with GPO managed settings.
* workstation-mode for testing to reduce join time
Also added mscldap-timeout requested by Feature #312
Added additional workstation mode parameters
Update README
Merge pull request #17 from dantremblay/add_vastool_to_path

Add option to create symlink to vastool binary
Merge pull request #21 from Ericsson/additional_parameters

Additional parameters
Merge pull request #20 from jwennerberg/fix_facts

Add vasmajversion fact as separate file
Release v0.6.0