CI: don't install scikit-bio with -e
CI: don't install scikit-bio with -e

This should hopefully trigger a failure with travis-ci. See #1061

kdmurray91/scikit-bio,colinbrislawn/scikit-bio,anderspitman/scikit-bio,SamStudio8/scikit-bio,anderspitman/scikit-bio,gregcaporaso/scikit-bio,SamStudio8/scikit-bio,gregcaporaso/scikit-bio,jairideout/scikit-bio,corburn/scikit-bio,jairideout/scikit-bio,jdrudolph/scikit-bio,jdrudolph/scikit-bio,kdmurray91/scikit-bio,colinbrislawn/scikit-bio,corburn/scikit-bio