Added an EExistValidator to replace CExistValidator
Change EExistValidator to EMongoExistValidator to avert collisions with
other users classes, bring on namespaces.
Forgot to rename the actual class
Added more readme
Updated English of added readme piece
Added the example app to the readme
Fixed typo in readme
Syntax error

EMongoCriteira => EMongoCriteria
Merge pull request #73 from acardinale/patch-1

Syntax error EMongoDocument.php
Made update() return actual response
Added actual response for insert()
Added preserveKeys: https://github.com/Sammaye/MongoYii/issues/75
Added getLastError and reverted the other changes
Added EMongoIdValidator for casting MongoIds
Solved: https://github.com/Sammaye/MongoYii/issues/76
Merge remote-tracking branch 'upstream/master'

Conflicts:
	EMongoDocument.php