Merge pull request #3204 from zorba-4/patch-2

getCached comment typo fix
Fix calls to sortBy revealed by HHVM tests.
Change implied doc block to be more clear as to what is implied.
Add new sometimes short-cut rule to only run validation if field is actually present.
Update change log.
Increment version.
Register core class aliases.
Added session.store.
Fixed typo in request container alias
Merge pull request #3207 from jkazimir/patch-1

Fixed typo in request container alias
Merge pull request #3201 from s1owjke/docs-fix

Docblocks fix
Add dependency check to read me.
Fix conflicts. Merge.
Add quick contribution note.
Flesh out read me.
Fix duplicate.
Remove some extra text.
Merge branch '4.1'
Rename View and Pagination Environments to Factory.
Rename environment to factory.