Implementation of where clauses
Code cleaned up, fixed a bug involving an engine terminating without notice, and added more comments
Added a few more comments and refactored a 'lil bit
Merge branch 'filtering' into devel
Upped to version 0.1.2 after merging with the filtering branch
First implementation of complete joiner. Missing test cases
Added case insensitive getter names support
Added test cases for the joining functionality
Removed no longer used test data structures
Merge branch 'joining' into devel