Various updates

- Added Comment based help
- Some indenting fixes
- Get-PluginID now returns hashtable instead of array (removes $Title, $Author, and $Ver from plugin loop)
- Some capitalisations (because I'm weird and it bothers me :P )
- Simplified report actions (i.e. email, display to screen). Might behave slightly differently, but removed lots of duplicated lines of code.
- Possibly more I forgot about
Merge pull request #100 from Sneddo/master

Various updates
New Header Image
Fixed missing end of calculated property
Added Datastore Cluster retrieval for V5+

Added the datastorecluster object to fix issue #93
Added check for VCSA
Updated for VCSA check
Merge branch 'master' of https://github.com/alanrenouf/vCheck-vSphere