cache first shoot
CacheHostPoolProvider
Merge remote-tracking branch 'origin/develop' into feature/instances_pool_cache

Conflicts:
	src/Toper/HostPoolInterface.php
	src/Toper/SimpleHostPool.php
	tests/unit/Toper/StaticHostPoolProviderTest.php
Cache Pool Provider - missing tests
Merge remote-tracking branch 'origin/develop' into feature/instances_pool_cache
typos
Merge pull request #7 from allegro/feature/instances_pool_cache

Feature/instances pool cache