Config work on merge method
Config write offsetSet method
Config added offsetUnset support
Config more native type checks and remove unneded @param exp in php method(s) docblocks
Config implement get method
Uncomment config test
Merge pull request #2899 from niden/2.0.0

Corrections and additions to tests
Merge pull request #2857 from ovr/2836_nfr_phalcon_config_merge

Implement Phalcon\Config
Renamed Logger\Adapter\File test to better suit the suite
Added Logger proxy classes
Merge remote-tracking branch 'upstream/2.0.0' into 2.0.0