Added Makefile that builds R package.
Handle versions better.

Version number is taken from git tags and commit ids,
and is automatically used to build the R package.

Added function splicing_version() to query the version
number, as the usual R version is mangled in this case,
because it is not flexible enough to store arbitrary
version strings.
Functions to convert coverage to number of reads, and back.
Makefile: make DESCRIPTION phony, so it is always re-generated.
Fixed a getEnsemblGenes bug, maybe changes at Ensembl....
Fixed a typo in coverage_to_no_reads.
crComplexity accepts matrices for expression profiles (columns).

It returns matrices as well, a complexity profile for each expression
profile. If not given 100 random Dirichlet(1,1,1....) profiles are
used.
CR: added an extra check for the assignment matrix.
Added splicing_strvector_set.
Added copying type converters for vector, strvector, gff.
Enselbl downloader reindexes GFF now, to create a proper file.
Fixed some compiler warnings, size_t cannot be negative.
Added prototype of splicing_version().
Fix selectGenes when idx is a character of IDs.
crComp: fix assignmentMatrix parameters.
Add crMatrix, full inverse of the Fisher info matrix

Not just the diagonal, as in crComplexity.
Simulate expression profiles with given bio variance
(Almost) empty crComplexity manual page

To have an example...
Add own rmvnorm function

So that we don't depend on mvtnorm and we can also
call zapsmall().
Remove old power functions