Sticked Operators Rules: Deprecate in favor of more specific rules

* output deprecation notice with list of rules to use instead
* update documentation
Correct name of the test

Per @Krinkle review
Impelement yandex preset

Closes gh-414
Add documentation for yandex preset
Remove merge artefact
Use "dot" reporter for tests

Since jscs now have a lot of tests
it would be better to use more minimalistic reporter
Add more structure to some tests
Add tests for empty array and object

For rules requireSpacesInsideObjectBrackets and
requireSpacesInsideArrayBrackets

Closes gh-440
Remove extra newlines in tests
Implement requireYodaConditions rule

Fixes #380
Updating mocha
implement fileExtensions option
Prepare for version 1.5.0
1.5.0
DOCS: move contributing guide to correct spot and update release steps.
Prepare for version 1.5.1
1.5.1
Improve Checker#checkDirectory method

Make it aware of "fileExtensions" option

Ref #445
Place fileExtensions fixtures on right path
Fix recursive descend

* Break down "_shouldProcess" method to two private methods

* Simplify checker module, it contradicts original code idea
but it easier to read

* Add tests for checker module

Fixes #445
Closes gh-447