minor packaging updates for 0.3.1 after test

.gitignore

@@ -14,6 +14,8 @@ __pycache__
 */cython_version.py
 htmlcov
 .coverage
+MANIFEST
+.ipynb_checkpoints
 
 # Sphinx
 docs/api

POPPY_tutorial.ipynb

@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:7ec52d0f56408cd483f10ea6936c279e6338e7e7a6583764fb08a5b57797bb56"
+  "signature": "sha256:35317e3da0db2e79fed5ee2de89ed2f73d515f86bee7afb3b2d1da131202f7e0"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -20,7 +20,7 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "This document is not intended as comprehensive documentation for the ``poppy`` package. Please see [the documentation](http://www.stsci.edu/~mperrin/software/poppy/) for full details in the API, and the SPIE papers by Perrin et al. ([2012](http://adsabs.harvard.edu/abs/2012SPIE.8442E..3DP), 2014) for further background information and discussion of algorithms.  However this notebook should be enough to get you started. \n",
+      "This document is not intended as comprehensive documentation for the ``poppy`` package. Please see [the documentation](http://pythonhosted.org/poppy/) for full details in the API, and the SPIE papers by Perrin et al. ([2012](http://adsabs.harvard.edu/abs/2012SPIE.8442E..3DP), 2014) for further background information and discussion of algorithms.  However this notebook should be enough to get you started. \n",
       "\n",
       "Poppy implementsan object-oriented system for modeling physical optics propagation with diffraction, particularly for telescopic and coronagraphic imaging. Right now only image and pupil planes are supported using Fraunhofer (far-field) diffraction; Fresnel modeling of intermediate planes is a future goal."
      ]