Add clz and ctz
More clz,ctz,log2floor changes
Use new clz/ctz/log2floor
Fix arguments for non-public *_factor functions
Add ppport.h finally
Merge bulk88 XS changes.  Add ppport.h use.
spacing
small performance increase for next_prime
Add simple (and likely buggy) Pollard Rho DLP
Call Math::BigInt importer only if it hasn't been loaded already
Changes for Math::BigInt::Pari (it doesn't play well with others)
Remove the old -nobigint flag.  Better random ndigit for some old examples.
Honor rounds in Fermat
Fix stupid cpp typo
_BitScanForward on Visual C <2005 support