maximumLineLength should not be destructive

Fixes #589
Correct jscs config and found errors

Thanks @zxqfox
Do not strip json config from comments
Coverage integration
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Format README
Update README.md
Update README.md
More precise coverage collection.
Node -> Tokens navigation, token list navigation
Add "iterateTokenByValue" method

Closes gh-597
Simplify tests for stdin

Closes gh-596
Fixes #547
Add checkStdin method

Closes gh-594
Fixes #577
Add "safeContextKeyword" to jscs config
Tests: stdin data should pass the supplied config

Closes gh-607
Fix our violations of disallowMultipleVarDecl
Enhance google's preset

Closes gh-609
Fixes #506
Add additional comment to google preset test
Prepare for version 1.6.0
1.6.0