+ GitLFS client support
+ FilestoreModel now parses meta file
+ Read meta heading from cache if available
+ Authentication based on accept headers for browser view filestore login
+ PathModel & PathChangeModel now understands filestore items
+ Zip & Rar downloads contain include filestore items
+ Filestore servlet returns LFS JSON error only if accepted by client
+ DiffStat now knows repository to allow identification of filestore items
+ Filestore items identified and returned via view, raw & blob links on
blame, commitDiff, commit and Tree pages

Change-Id: Ifc878cb59fe66674e6dfdc6d233fa26be1f4d605

Change-Id: I8f26746a611e9ab955efe8b2597cc81db48fb085

This is a massive commit which reorganizes the entire project structure
(although it is still monolithic), removes the Build classes, and
switches to Moxie, a smarter Ant build tookit based on the original
Gitblit Build classes.

The Ant build script will likely require additional fine-tuning, but
this is big step forward.

Each Gravatar thumbnail is now a link to the Gitblit Gravatar profile
page.  This page displays some of the profile information and contains a
link to the full Gravatar profile.

Activity page links now launch a new window/tab instead of targeting
"self" since it can be expensive to requery the activity information.

Also fixed /dev/null reference due to deletion change.

This seems to improve page loading times.

Change-Id: Ifce000c85c8947c3a768e782c841e41a8953d314