Rename hgignore to gitignore.
Update repo link in README.md.
Add jlt code to extern/jlt instead of subrepo.
Update jlt lib to latest version.
Add .gitignore to extern/jlt.
Update rodent to use JLT_TRY, etc instead of _TRY.
Let autoconf choose compiler.
For g++ 4.9.2: use this-> for methods when used in class.
Update jlt lib to latest version.
Split .gitignore.
Remove any refrence to blitz.  Leave in branch update-blitz-support.
Merge branch 'master' into update-blitz-support

Conflicts:
	.hgignore
	rodent/blitz_traits.hpp
	testsuite/blitz_adaptiverk4.cpp