We're not using the old hide_stderr.py script anymore
Committing current version of BLAST test files (no history).

Up until now, the BLAST+ Galaxy tools were developed on a branch of
an hg repository holding the whole of Galaxy, with the test-data/
folder holding the unit test data files, and tools/ncbi_blast_plus/
holding the wrappers themselves.

During the migration and extraction to git, only the tool history
was preserved. Historic revisions to the test data (e.g. updates
when changing BLAST version) have been lost.
Move contents of ToolShed entry 'blast_datatypes' into its own folder
Move blastxml_to_top_descr into its own folder
Move reciprocal_best_hits into its own folder
Move core BLAST+ wrappers into their own folder
Now blastxml_to_top_descr is in a separate folder, it needs a copy of repository_dependencies.xml
Add note about other BLAST related tools also in this repository
Adopt README.rst rather than $NAME.rst
Expand on main README file
Add basic README for reciprocal_best_hits tool
Add current sample BLAST database location files (no history).

As with the test-data folder, the hg to git extraction only
grabbed the main tool history, and ommitted these auxilluary
files.
Add note about where to file bug reports to the README files
Update tar-ball instructions after hg->git migration
Update blast_datatypes tar-ball instructions after renaming README
Update ncbi_blast_plus tar-ball instructions after hg-->git move
Update ncbi_blast_plus tar-ball script after hg-->git move
Minor clarifications to main README file
Tell Git to ignore any tar-balls