Fixed issue which traits sniff cause mess in php < 5.4

The constant values for tokens vary based on PHP version.
bump version and update changelog
add travis support
expanding build matrix with php versions 5.2 and 5.3
fixes for 5.2
Fix error messages
remove outputstring from error message, failing test will already show why the assert failed, and include the output string
Merge pull request #15 from ceeram/travis

add travis support
add more tests for operator pass
remove sniff, PHP_CodeSniffer rule for this is ok
Merge pull request #17 from ceeram/operator

add more tests for operator pass
adding back sniff which was incorrectly removed in previous commit
fixing operator spacing issue
Merge pull request #18 from ceeram/master

Added back the sniff and fixed the outstanding issues
simplyfying operator spacing sniff
adding sniff for space and tab mixing, remove ForceTabIndentSniff using Generic.WhiteSpace.DisallowSpaceIndent instead
Merge pull request #19 from ceeram/operator

simplyfying operator spacing sniff
Merge pull request #20 from ceeram/tabspace

adding sniff for space and tab mixing, remove ForceTabIndentSniff using ...
Bump version and update changelog
fix for issue #24