hotfix - Travis failure on confusing module name
Merge branch 'master' of https://github.com/cmillion/gPhoton
propagated calpath keyword in curvetools
Merge pull request #84 from parkus/issue80

#80 propagated calpath keyword in curvetools
- Took a pass through from title to Section 3 (and added Section 3).
Merge branch 'v1.15' of https://github.com/cmillion/gPhoton into v1.15