BUG: Index column is now the one named sample_name

The index column for sample and prep templates were being assumed to be
the first one in the file, this has been changed for it to be the
column named sample_name.
BUG: Add missing graph
add logging to study processing
Allowing split libraries to run on studies with multiple lanes
Adding run_prefix as a required column for target_gene studies
Fixing test commands to honor the required target gene columns
control access to the error page
flake8 and test fixes
Fixing small bug on the handler and making sure that the cmd is always a string
addressing comments
BUG: Use read_csv in anticipation to deprectation
Merge pull request #461 from josenavas/slib-more-1-lane

Slib more 1 lane
TST: Change #SampleID -> sample_name
STY: Fix PEP8s
Merge branch 'master' of git://github.com/biocore/qiita into do-the-panda
ENH: Centralize calls to csv parsing using pandas

Partially do the dinosaur with #449
BUG: Malformed import statement
Merge pull request #453 from ElDeveloper/do-the-panda

BUG: Index column is now the one named sample_name
Merge pull request #459 from squirrelo/log_process_error

Add logging to study processing
BUG: Studies without processed data caused an error

:sad: