score can change depending of the nature of the field
add documentation on the new feature
Allow to use a callback to prepare the value for fields
can be done specifically for each field, or in general in search config
refactoring : split_string also filters words (by length and listing of forbidden words)
a default boost is provided for titles score
Bugfixes

* support for multiple tags
* better regex (multiline, case insensive)
* inside a tag, use boost only (and not position)
Default boost config
Merge pull request #1 from jay3/vrcAlbert-feature/config_score

Improve score boosts
Merge pull request #4 from vrcAlbert/feature/config_score

Score boost depending of the nature of the field and/or html tag