Spladder

This release introduces a new visualisation mode

* splicing graphs, events, coverage, etc can now be visualised with individual tracks
* documentation was extended to describe new visualisation mode
* a bug that caused `--validate-sg` to be ignored was fixed
* a new feature to specific the support for edges in `--validate-sg` was added

Bugfix / Doc Release

* fixed bug not correctly ordering isoforms in mutex exon events
* fixed bug inverting PSI computation for alt 3'/5' events
* extended and moved documentation onto separate platform

Bugfix release
* changed requirements
* minor cleanups

Bugfix release
* gracefully exit when attempting test of no-event output

Bugfix release.
* fixes mistake in parallel mode, when very large alignment files are used
* fixes parsing of bam-file list in viz mode

This release has the following changes:
* new option `--set-mm-tag` to customize the string for mismatch tags in alignment files for `build` mode
* restore compatibility to read files in `test` mode that were generated with previous SplAdder versions
* improved the internal re-use of quantified files in `test` mode when subsetting is selected