Updated works for qiime-tools 1.1.3

barcode_filter.py: added an if condition for checking is quality data
file is supplied by the user.
biom_relative_abundance.py: imported biom_calc, updated the function to
use the newer version of relative_abundance() function form
biom_calc.py.
biom_calc.py: updated relative_abundance() function so that it
calculates the data for all samples of a biom file. Function takes only
one argument now (biom file).
test_biom_calc.py: updated the testing scripts for the newly updated
biom_calc scripts.
Updated bin scripts

Updated iTol script to accommodate raw calculations based on OTUID's
instead of SampleID's.
PCoA, PCoA_bubble and restrict_repset edits are from syncing the fork.
No changes were made from my end.
[ci skip]
Merge remote-tracking branch 'upstream/master'

Merging my fork.
Updated iTol.py

Updated transform_raw_abundance to calculate using OTUID's instead of
SampleID's.
[ci skip]
Merge pull request #19 from akshayparopkari/master

Minor fixes for several scripts and core library functions