0.1.0: 
- Initial release

0.1.1:
- SOAPpy struct type recognized
- Category division in predefined data sources
- Added Kegg to predefined data sources
- Intersect/union/except added with Infix operators  (e.g. |Intersect|)
- Infix operators for Match/Stack
- Improvement in TSV detection of skipped rows and fieldnames handling
- Load wrapper_sql and wrapper_tsv only when needed
- Add Python version check
- Several bug fixes
- Cytoscape read/write support using CytoscapeRPC (access using CyNetwork) 


0.1.2:
- Much improved performance (memory/speed) for broadcast in in/contains/filter operations
- Added replace operation, used for identifier mapping
- Added merge operation, also included in match. Merge operates on two slices that have missing values,
  creating one consistent slice. 
- added support for len
- various bug fixes

