Fixed comments for code
Updated doc comments
Updated Exceptions codes and parents
Fixed AbstractRequest
Added Validator Rules:
- `condition($condition)` - build rule by any condition
- `latin($additionalCharacters = '')` - check for latin characters
- `latinNumeric($additionalCharacters = '')` - check for latin characters and numbers
Updated rule message
Fixed test
Session optimization
Merge pull request #210 from AntonShevchuk/master

Added Validator Rules:
- `condition($condition)` - build rule by any condition
- `latin($additionalCharacters = '')` - check for latin characters
- `latinNumeric($additionalCharacters = '')` - check for latin characters and numbers
Fixed AbstractRequest
Fixed codestyle
Session optimization