Fix: seg. fault over Q in J7 due to deleted number

add: more debugging assumes
add: FORCE_INLINE for some small static functions
add: myp_Head = p_Head with testing!
+minor things
Ensure monic input to Schreyer resolution computation
Improved Cache Keys - no need for numbers in some cases
Removed duplicating debugging nPrint from kernel/numeric (in favor of using n_Print)
Mark possible bugs: use of npSetMap in coeffs/OPAE*.cc for cfSetMap!