fix spelling
Merge branch 'master' of github.com:Macaulay2/M2
Merge branch 'master' of github.com:Macaulay2/M2
update licensing comment
udpate ntl licensing documentation
remove uses of Singular's routine "newfactoras"

because version 4 omits it.  It was an experimental routine for
factoring over field extensions expressed as consecutive simple
extensions of the prime field, and didn't work well.
recover test file rawFactorOverTower.m2
Added assertion failure in mpir

When debugging is enabled, this example causes an assertion failure.
As far as I can tell, the resulting Groebner basis is still correct though.
Merge remote-tracking branch 'm2/master' into linalg