Cblaster

- add gffutils to requirements

- Fixed a bug when resuming remote searches from BLAST RID
- Added extract module to GUI
- Changed default values for gne module

- Fixed bug when performing local searches on Windows due to issues with temporary files

- Added extra options in plots to adjust size/position/visibility of plot elements
- Cell borders are now drawn when cells contain shared hit sequences (indicated by same colour border), not just because cell contains >1 hit
- Sequence names (and optionally sequences via NCBI) can now be extracted from search session files using the extract module
- Added GFF3 parsing for creating cblaster local databases via [genome2json](https://www.github.com/gamcil/genome2json)

- Add ability to save raw BLAST and IPG tables
- Move filtering of IPG table to later stage to avoid missing potential homologues when BLAST hit is e.g. a SwissProt entry
- Raise hitlist_size from 500 to 5000 to avoid missing potential hits in widespread sequences
- Updates to the command line interface, example usages, new options
- Add ability to load and merge multiple session files from the CLI