Segtools

* Filled in large holes in documentation
* Improved robustness of installation script
* Renamed many of the Segtools commands for simplicity
* Made BED/GFF files interchangable for most arguments
* Added ability to pre-process segmentations with segtools-preprocess
* Made aggregation significance non-default (since it is not yet mathematically sound).
* Cleaned up command-line interfaces
* Sped up aggregation

* Added additional functionality to feature-distance
* Added flatten-bed module
* Improved g[ft]f handling of comments
* Overlap plot is now in P-R- instead of ROC-space
* Added significance to aggregation plots
* Updated mnemonic file specification

* Allowed parallelization of signal distribution
* Added overlap heatmaps
* Removed GSC interfacing for overlap significance

* Improved all plots
* Improved GMTK support
* Improved HTML report and added explanations
* Bugs still exist in signal_distribution
* GMTK still not separated

* Initial release