Now one can disable rules, exclude folders/files from scan.

1. Pass on ignore rules using --ignore-rules= long argument.
2. Added sample.ignorerules.xml :- Sample file which shows how ignore rule files can look like.
3. Defined ignoreRules and ignorePatterns to hold patterns and rules.
4. Added CHANGE_LOG
Merge branch 'master' of github.com:umakantp/SmartyLint