Fixed the B200 parameter to use the correct value from Duffy et al.
Merge branch 'master' of https://github.com/MCTwo/MCCutils

# By wadawson (2) and Will Dawson (1)
# Via wadawson
* 'master' of https://github.com/MCTwo/MCCutils:
  fixed bug with tools.angendpt() (closes issue #3)
  Added .gitignore file
  fixed B parameter of Duffey et al scaling relation. closes issue #2
trying to fix nfwparam so it works correctly with 1e14 Msun as unit for M200
Fixed error due to multiplying 1e14 at the wrong place