Merge pull request #144 from erwinwinder/master

Async indexing
bug fix: xref get request with expand param not working
update test
Merge branch 'master' of https://github.com/molgenis/molgenis
Merge pull request #146 from dennishendriksen/master

Bug fix: Entity API xref GET request with expand param not working
add entity api js client, cache resources
Merge branch 'master' of https://github.com/molgenis/molgenis
Merge pull request #147 from dennishendriksen/master

Javascript Entity API client + resource caching
Indenting
Range filter
Merge branch 'master' of https://github.com/molgenis/molgenis
Prevent nullpointer
Range filter