Implement lessThanOrEqualTo and greaterThanOrEqualTo
Implement matching with a regular expression
Support matching functions taking 2 parameters, implement ranges

Fix call to addPositiveMatchers missing parameter
Fix init to return Bacon instead of where
Add IDEA files to gitignore
Add new matchers to README.md
Merge pull request #3 from jliuhtonen/master

New matchers, possibility to add matchers that take 2 parameters