Added ALARA input generating function, needs tests.
ALARA input generation tests written and passing.
Removed extraneous whitespace from MCNP geom input generation function.
Merge pull request #294 from elliottbiondo/extra_space

Removed extraneous whitespace from MCNP geom input generation function.
Fixed spelling
Merge pull request #291 from elliottbiondo/alara_inp

Function to generate ALARA input blocks
mcnp.py clarification.
Merge branch 'staging' of git://www.github.com/pyne/pyne into staging