Removed unnecessary $attributes parameter
Fixed getCollection()-call which caused Exception on uninitialized DB
Merge pull request #151 from tvollstaedt/file-fixes

Fixes for EMongoFile class
Fixed: https://github.com/Sammaye/MongoYii/issues/152
https://github.com/Sammaye/MongoYii/issues/153
Fixed: https://github.com/Sammaye/MongoYii/issues/148
Fixed: https://github.com/Sammaye/MongoYii/issues/154
Added utils to MongoYii
Doc fix
Doc fix
Added EMongoSession
Added support file filenames in EMongoFile

refs #155
Switched or with ||

refs #156
Wrapped logical && into braces

refs #156
More safe if statement in getFilename()

refs #156
Merge pull request #156 from tvollstaedt/issue155

Added support for  filenames in EMongoFile
Added stream abilties in EMongoFile:
https://github.com/Sammaye/MongoYii/issues/155
Reverted last change
Doc fix
Fixed: https://github.com/Sammaye/MongoYii/issues/157
Fixed: https://github.com/Sammaye/MongoYii/issues/159