fix missing activated -> linked
fix case where spec is only package name
fix but in env.features, better exception specs
working features/tracked features
fix for lookup_from_features
slight perf enhancements
silence a pyflakes warning
possible avenue
fix missing activated -> linked
fix case where spec is only package name
fix but in env.features, better exception specs
working features/tracked features
Merge branch 'features' of github.com:ContinuumIO/conda into features
Merge branch 'features'