added default Object_Cache and added apc cache implementation at oc-content/
cached latestItems() function
cached CityStats::newInstance()->listCities(), RegionStats::newInstance()->listRegions()
cached Category::toTree() function
minor style fix at stats() function
cached Category:findByPrimaryKey function
cached ItemResource:getAllResourcesFromItem function
Added object_cache factory
load cache at installation
Merge branch 'develop' of github.com:osclass/Osclass into develop
Merge branch 'develop' into object-cache-apc
minor improvements
added is_supported function
minor fixed
added apc cache implementation
added memcache cache implementation
minor bug fixes
added constant OSC_CACHE_TTL, default time to live of caches
minor fixes
now OSC_CACHE_TTL on all osc_cache_set function calls