moved the assembly functions into a separate file
Removed another reference to biopython and replaced the required functionality
Move the taxonomy assignment away from the TaxonSegregator
New class that integrates bowtie into the other Qiime taxonomy
assigners.  The Qiime taxonomy assignment code is implemented but
not tested
tested taxonomy assignment with blast - it works!
changed the default configuration to use blast by default
Update version number and remove biopython app controllers