Removed old build scripts
Build with node-gyp
Added V8-Convert
Add libgit2 error codes to error object
Refactored error object to wrap libgit2 error in a native Error object
Minor oid fixes
Added convenience-error test
Updated convenience-commit to work with new commit api
Replaced " with ', updated test
Updated convenience-tree to work with new api
Use error constants to check for completion of history walk, emit error appropriately if one is provided
Refactored tree walk
Updated index