Avoid feature type from using DefaultGeographicCRS.WGS84,

It causes inconsistent behaviour when storing in the database and then taking back the CRS from it
Merge branch 'wgs84' of github.com:volaya/GeoGit into volaya-wgs84
Replace patch at 1d1a096422 by a more succint one.
Fix bug in DiffPathFilter that was preventing some filters from being evaluated.

A wrong short circuit return statement in DiffPathFilter was preventing filters from being evaluated.
Add support for CRS transformations to DiffBounds

DiffBounds (the operation used by the CLI's diff --bounds option) can now
reproject to a given coordinate reference system. At least otherwise
specified, the returned bounds are in EPSG:4326.