Update */.gitignore
control/miner: Add some nullable annotations
sparql: Move TRACKER_ const in Tracker namespace

This is a *vala-only* API break.
control: Add make target to generate vala-bindings from GIR
miner: Add make target to generate vala-bindings from GIR

https://bugzilla.gnome.org/show_bug.cgi?id=735339
libtracker-bus, libtracker-sparql-backend: Fix all TRACKER_DBUS* to Tracker.DBUS

Since commit e8eda5803c4d403283bd09cefe8122fecc0753ef