added FieldValueFunction (issue #77)
fixed function name from "field_value_function" for "field_value_factor" (issue #77)
fields have to be set using the function name as prefix (issue #77)
created dist (issue #77)
added unit tests (issue #77)
Added max_boost to FunctionScoreQuery
Merge remote-tracking branch 'origin/issue77_fieldvaluefunction'
Merge branch 'function_score_query_max_boost'

Conflicts:
	dist/elastic.js
	dist/elastic.min.js