Draft implementation of DataCollector

* Added a CacheOperationContext to store data long object transitions
* Use a simple CacheLogger implementation to collect
  CacheOperationContext objects
* Minimal templating of DataCollector profiler view
renamed data collector to kitano_cache
renamed data colector to kitano_cache (everywhere)
Show the cache operations count in menu
fixed implementation of CacheUpdateOperation for CacheLogger
Add DataCollector to TODO list
change branch for Travis
Fixed typos
Fixes #4
Merge branch 'data-collector'

Conflicts:
	Aop/Interceptor/AbstractCacheOperation.php
	Aop/Interceptor/CacheEvictOperation.php
	Aop/Interceptor/CacheInterceptor.php
	Aop/Interceptor/CacheUpdateOperation.php
	Aop/Interceptor/CacheableOperation.php
	Resources/config/aop.xml