* segtools-nucleotide-transition: significant (several-hundred-fold) speedup
* segtools-transition: added R transcript
* segtools-aggregation: added R transcript
* segtools-overlap: Fixed bug in argument parsing that caused R plotting to fail
* docs: Added high-level structured summary of the output of each command
* requirements: Genomedata package now only required to use segtools-nucleotide-transition and segtools-signal-distribution, not for unrelated commands
* docs: Unified usage terminology to use "annotation" and "feature" (instead of "annotations" and "entries", for example)
* segtools-*: Added -R option to allow command-line specification of R
options to segtools commands that plot using R.