Pyptv

- `conda install swig`
- bleeding edge `enable`
- newer `chaco`
- `optv` 0.2.6a

conda recipe

this is a bug fix release
1. manOriParams
2. overwriting addpar in raw_orient (external_calibration)

In this release we fixed some old bugs:
- `man_ori.dat` wasn't copied from a run folder

and added
- multi plane calibration, thanks to lengelen and yosefm
- external targets, thanks to ronshnapp

This version compiles against liboptv, Python bindings and passes all the tests: C code is tested using Check unit testing framework, Cython/Python bindings and PyPTV are tested separately and altogether using nosetests, on Travis-CI