Mention existing groups now that they exists
Deprecate a lot of Utils class

There is _one_ method which can't be deprecated though.
More Utils cleanup...

Only two methods are used!
Remove three useless test files
²
Preliminary version of JoinMatcher
JoinMatcher: some modifications

Matching not written etc.
JoiningRuleBuilder: implement min(), max(), times()
Modify Join{ed,ing}RuleBuilder

Make JoinedRuleBuilder accept a BaseParser as an argument so that it can use its
.toRule().
JoiningRuleBuilder: add .range() method

Takes a Guava Range as an argument. Sanity tests. But not tested yet...
More code for JoiningRuleBuilder, and start tests
Change yet more join code...

One day I'll decide on class names etc! One day...
Make JoinMatcher abstract, specialize cases

There are quite a few of them!
Add class tests for generated JoinMatchers