Version 1.5

This update brings fundamental speed improvements to PostMesh, mainly:

1. Extremely fast and efficient curve intersection identification cutting the computational time from days to seconds
2. Initial bounding box check for surface identification to filter out irrelevant CAD parts, again cutting the computational time from days to seconds
3. PostMesh can now compile with user defined compiler by specifying python setup.py build_ext CXX=/path/to/compiler