Reduce redundant DB before every solve() call

This way, simple problems with many solutions should solve easily. Also,
don't lock the best UIP clauses on these special clean runs
Disable BVA when doing DRUP
Fixing typo: agressive -> aggressive
Better check for resolved bin clause subsuming other implicit clauses

Bins are actually not subsumed, just marked as already inside and not
added. Tris are all subsumed
Reset reduceDB clean limit at every solve() call

Helps with small problems where a lot of solve() commands are issued
in a library use-case scenario