add meta pow function for integer and half integer exponents
add integer and half-integer versions to inverse power cpp
add Hook (pow==2) wrapping, fix cpp bugs
add Hertz (pow==2.5) wrapping
pull sqrt out of bracket, add basic meta pow cpp tests
add more meta pow tests
put all power potentials into same python class
fix numerical issues in pow test
add cpp tests for integer and half integer templates in power potential
resolve conflict
add references
add static asserts for exponent values
Merge remote-tracking branch 'upstream/master' into power_pot_templates
Merge remote-tracking branch 'upstream/master' into power_pot_templates
add documentation and example
Merge pull request #62 from kjs73/power_pot_templates

Power pot templates