fixed changed test to catch ValueError. Changed add_alpha_to_mapping to raise value error.
small syntax changes.
small changes
removing old version of script docs
updated script docs
updated __version__ strings
removed __status__ tag from all files, fixes #588
updated version
updated change log
fixed typo
reworded one entry
updated version string through-out
removed outdated text
Merge pull request #1287 from johnchase/add_alpha

fixed changed test to catch ValueError. Changed add_alpha_to_mapping to ...
Merge branch 'master' of github.com:qiime/qiime into 180-release
Merge pull request #1290 from gregcaporaso/180-release

QIIME 1.8.0 release canididate