Phconvert

What's New?
- Fix an error when using `require_setup=False` and the setup group is missing in the input data.
See 3514a021830a40ee0d2c4db6b7c90e28224f527f.

What's new?
- Add support for reading Becker & Hickl SPC from SPC-134/144/154/830
- Documentation fixes
- From now on conda packages will be built and hosted by [conda-forge](https://conda-forge.github.io/). As a results you can install phconvert with `conda install phconvert -c conda-forge`.

_Many thanks to lampo808 for adding the SPC support!_

What's New?

File decoding
- Improved reader for Becker & Hickl SPC files, now more metadata is automatically retrieved.
- Add support for decoding PicoQuant PT3 files

Testing
- Add support for Continuous Integration. phconvert notebooks are now automatically executed on each commit on windows (AppVeyor) and linux (Travis CI) on python 2.7, 3.4 and 3.5.

Docs
- Improved reference documentation now including [bhreader docs](http://phconvert.readthedocs.org/en/latest/bhreader.html) (read Becker & Hickl files) and an improved [pqreader docs](http://phconvert.readthedocs.org/en/latest/pqreader.html) (read PicoQuant files).

What's new?
- Fix a runtime error when saving Photon-HDF5 files under python 2 (issue 9 and PR 10).
- Fix error message when input file HT3 was not found (bb03cf31d6e552f9abcd004e440f7bb068de3278)
- Notebook updates

What's new?

Small fixes and improvements:
- Add option to allow missing setup group (both saving and validation) b35e6d0e7512b8499fb5057da4e279bd68b8afa2
- Better handle input for array fields (e.g. detectors_specs) in a variety of formats (tuple, list, array with ndim=0, array with ndim=1): 1ad5ca93f372cbeb78c9945b7b8234439edb543a and e07ddbac4c80e14da41820039d200cea9614cd1b.
- Runtime error fix: d7fff767e019920dc04ed8139468e979b6fc92f8
- Documentation improvements

What's new?
- `tcspc_range` in `nanotimes_specs` is now optional
- matplotlib is now only an optional dependency
- More validity tests on Photon-HDF5 files
- More input normalization (for YAML) for `data_dict` argument in `save_photon_hdf5()`
- Tests validity of input `data_dict`
- Update versioneer