Providing soft deprecation when directly loading `Apc` adapter file.

All cache adapter extend a base cache adapter class since
7b4de1d06a46f45e95ec2d4d5bdcea5776fd491c.

The apc adapter was manually loaded in the app bootstrap (which has
already been changed not to do so anymore) in order to optimize the
startup time.

It can be assumed that users may upgrade their lithium installation
but not the app. Until they do this commit provides a workaround.

This deprecation notice should be removed with the next minor version
release.
Make static methods concrete in session php adapter.

These methods have been called as concrete methods and other
adapters also have just concrete methods.
Making session_cache_limiter configurable.
Cleanup.
Documenting indexed conversion in entity and collection.

Refs #1072.
Covering third option value to indexed in `Collection`. Fixing typo.

Refs #1072.
Fixing left-over PHP session adapter static calls.
Fixing regression and usage of `$self` in `Php` session adapter.
Fix tests to run and pass on windows
Merge pull request #1073 from tefra/fix-tests-under-win

Fix tests to run and pass on windows
adding http status codes according to rfc6585
Merge pull request #1075 from bruensicke/http429

adding http status codes according to rfc6585
Update Redis adapter

- Add host/socket connection conditions
- Fixes PHP undefined offset notice - Redis.php:97
- Add socket configuration for redis and restart it
- Tests
Merge pull request #1076 from SobanVuex/dev

Update Redis adapter
happy 2014
Merge pull request #1078 from bruensicke/2014

happy 2014
Update Mongo drivers (Closes #698).
Merge pull request #1079 from jails/fixes/mongo-client

Update Mongo drivers (Closes #698).
Make lithium tests compatible with last mongo driver & If there's nothing to update just return true (since empty $set now generate an error using recent mongo drivers).
Merge pull request #1083 from UnionOfRAD/bug/fixes

Make lithium tests compatible with last mongo driver & fixes a BC break