Add features and some leniency

[dorilla]

• [x] add boosting for groups
  • [x] add testing for boosting for groups
• [x] support "some distance phrase" ~10 (the spaces between)
  • [x] add tests
• [x] support "some boost phrase" ^10 (the spaces between)
  • [x] add tests
• [x] support (some boost phrase) ^10 (the spaces between)
  • [x] add tests
• [x] support negation with a bang (eg. !"this term)
  • [x] add tests
• [x] spaces between operands should be optional
  • [x] add tests
• [x] allow for other kinds of spaces (non-breaking space, zero width space)
  • [x] add tests
• [x] add && and ||
  • [x] add tests
• [ ] ~~support blank search (eg. '')~~
  • [ ] ~~add tests~~

I am also working on a library to take this result and convert it into a composed elasticsearch query... will update here when it's complete

[zerowidth]

Seems fine so far. I didn't know lucene's parser was as lenient as that.