Fix appveyor missing headers

[rmcgibbo]

No description provided.

[jchodera]

Thanks!

Fixes #523

[jchodera]

Headers are certainly fixed, so merging---thanks!

The failures seem to be due to package conflicts in recipes:

BUILD START: pyemma-2.1.1-np111py27_0
Fetching package metadata: .......... 
Solving package specifications: .Using Anaconda Cloud api site https://api.anaconda.org
... 
Error: The following specifications were found to be in conflict:
  - bhmm >=0.6,<0.7 -> numpy 1.10*|1.11*|1.9*
  - bhmm >=0.6,<0.7 -> scipy
  - matplotlib -> numpy 1.10*|1.11*|1.9*
  - mdtraj >=1.6 -> numpy 1.10*|1.11*|1.9*
  - mdtraj >=1.6 -> scipy
  - msmtools -> numpy 1.10*|1.9*|>=1.7
  - msmtools -> scipy
  - numpy 1.11*
  - python 2.7*
  - scipy -> numpy 1.10*|1.9*
  - thermotools >=0.1.14 -> msmtools >=1.1
  - thermotools >=0.1.14 -> numpy 1.10*|1.9*
  - thermotools >=0.1.14 -> scipy >=0.11
Use "conda info <package>" to see the dependencies for each package.
ERROR: File does not exist: C:\Miniconda\conda-bld\win-32\pyemma-2.1.1-np111py27_0.tar.bz2
Using Anaconda Cloud api site https://api.anaconda.org
[conda-build-all] Error: one or more packages failed to build (win-32)
  msmbuilder-3.4.0-np111py27_0.tar.bz2
  pyemma-2.1.1-np111py27_0.tar.bz2