update json mapper and reducer
Merge branch 'development' of github.com:usc-isi-i2/Web-Karma into development
Add class to replace @id and @type with uri and a
Fix WK-386
Change mapper for efficiency
Optimize Apply R2RML, call alignment.align only once after the batch.
Merge branch 'development' of https://github.com/usc-isi-i2/Web-Karma into development