Requirement update

Updated the requirements for feature directory modeling to include
subdirectories contained within the directory.
Directory collection added

Added the ability to collect feature directories from arbitrary parts of
the codebase.
Bug Fix

Fixed some parsing bugs based around whitespace.
Bug Fix

Replaced some destructive method calls with non-destructive equivalents.
History update

Updating gem history in preparation for v0.0.8 release.
Version bump

Gem version bumped for v0.0.8 release.
Merge branch 'dev'