Added the ability to have multi-valued path facets
Merge pull request #2 from levonlloyd/master

Added the ability to do multi-valued path facets
added one more method for getWeight in weightedMultiFacet relevance
More reliable bql compiler.
fix weighted string getWeight(String)
Enable the kafka gateway listening on multiple topics.
expose kafka config properties.
bug fix SENSEI-270
bug fix: SENSEI-269
fixed a compilation issue and tests pass
added static _RANDOM variable for relevance usage
added test for random variable
Merge remote-tracking branch 'sguo/master'
added _RANDOM as keyword
added BQL support for the new internal variable _RANDOM
Merge remote-tracking branch 'sguo/master'
add indexing latency metrics.
use timer for indexing latency.
Added long as the activity type. Also fixed the bug when the activity
value is set to zero, when the corresponding document is updated in
hourglass
Fixed the problem with long range activity query