Allow most MAF tools to allow limiting of output species. MAF tools which do not allow species limiting include Extract Pairwise MAF blocks, MAF Coverage stats, and Filter MAF blocks by Size.
The functionality of Filter MAF blocks by Species and Filter MAF blocks by Size is now available in Filter MAF by specified attributes. Unfortunately tests are still not able to be written for the Filter MAF by specified attributes tool.
Add new bx-python eggs.
Reorganize all MAF tools into a unified directory, and update tool_conf.
Remember to update tool_conf.xml from one of the samples (tool_conf.xml.sample or tool_conf.xml.main).