New Samples for First(OrDefault) method
New Samples for Single(OrDefault) method
Code tidyup
Updated samples for All method
Correction for Get method samples
Added notes that FindBy is now deprecated
Tweaked notes for GetCountBy after Issue #228
Tweaked notes for Exists to reflect current issues
Updated samples for ExistsBy method
Merge pull request #9 from hmobius/master

Lots of updates