Update to skbio 0.1.1
Merge pull request #29 from ElBrogrammer/skbio-0.1.1

Update to skbio 0.1.1
app controller for sortmerna
class IndexDB added for sortmerna
app controller for sortmerna finished, working on unit tests
add more test cases
test cases finished for sortmerna app controller
sumaclust app controller
sumaclust removed from branch
updates to tests
changed picked to sortmerna output filenames as default in indexdb_default_param
sumaclust app controller added
updated app controller to return clusters, failures and files to remove; updated tests to conform
moved cluster creation to sumaclust app controller
added option for multithreading
added multithreading to sortmerna
added exception to create an empty output file is input was empty for sumaclust
pep8 executed, library declarations reordered
reordered imports
edited exit statements to use raise