new differential_abundance, now written with Rscript instead of rpy2.  tests also added.
add changes to ChangeLog and /doc/install/install.rst
add normalization techniques that have been suggested as alternatives to rarefying.
add taxonomy to CSS normalized table
Merge branch 'master' into normalize_table
remove R make_biom function in normalize_table.py
Merge branch 'master' into normalize_table
comment out accidentally uncommented comment
Merge branch 'master' into normalize_table
Merge branch 'master' into normalize_table
change normalize_table for metagenomeSeq v. 1.8.3
Merge branch 'master' into normalize_table
Delete DESeq.r

replaced this with DESeq2.r
slight DESeq2.r definition change`
Update DESeq2.r
make code more efficient
Merge branch 'master' into normalize_table
Merge branch 'normalize_table' of github.com:sowe9385/qiime into normalize_table
minor change
make even with biocore