Add coverageExclude config option support to exclude some files from the coverage report
Add matchBase option
Add missing tag closing for meta
Write coverage statistics to json file

Conflicts:
	lib/coverage.js
Merge pull request #74 from bem/feature/coverage-exclude

Add coverageExclude config option support to exclude some files from the coverage report
Merge pull request #75 from bem/feature/coverage-json

Write coverage statistics to json file
Restructuring docs

One big README is hard to use and navigate. Docs have been split
up into multiple files by topic with a brand new quick start.

Additionally, russian version has been brought up to date with english
one.

Closes #70
Replace extarnal dependency on GraphicsMagick with light-weight library png-img.
For now png-img supports only node 0.10, so we should allow failures on node 0.11 for Travis