Initial Memcached implementation
Mysql indexes.
'tag_idx' will throw MYSQL ERROR 1170 -- if the index is needed then we should split keys and tags into diff tables and use VARCHAR(255).
Passing a few more unit test (TDD).
Typo
Started StringerSet feature for memcache indexing…
Interface change: added loadKey(), loadTag() and removed load().
fix
Added namespace and indexing/tagging support.
Separated generic unit test cases.
Created MemcachedIndex
test
All tests passed.
Added an Indexer adapter.
Minor chnageMinor chnagess
Started ApcIndexer.
insignificant.:wQ!
Merge branch 'feature/Memcached' into feature/ApcIndexer

Conflicts:
	src/php/Apix/Cache/AbstractPdo.php
	src/php/Apix/Cache/Apc.php
	src/php/Apix/Cache/Mongo.php
	src/php/Apix/Cache/Pdo/Mysql.php
Whitspace.
Doc comments and whitespace chnages.