Fix url to fatiando fork

environment.yml

@@ -1,27 +1,27 @@
 name: moulder
 channels:
-    - defaults
-    - conda-forge
+  - defaults
+  - conda-forge
 dependencies:
-    - python=2.7
-    - pip
-    - numpy
-    - scipy
-    - matplotlib
-    - numba
-    - future
-    - basemap
-    - pillow
-    - jupyter
-    - sphinx
-    - pytest
-    - pytest-cov
-    - coverage
-    - flake8
-    - pylint
-    - cython
-    - sphinx-gallery
-    - sphinx_bootstrap_theme
-    - pyqt
-    - pip:
-      - "git+git://github.com/santis19/fatiando@polygon_orientation"
+  - python=2.7
+  - pip
+  - numpy
+  - scipy
+  - matplotlib
+  - numba
+  - future
+  - basemap
+  - pillow
+  - jupyter
+  - sphinx
+  - pytest
+  - pytest-cov
+  - coverage
+  - flake8
+  - pylint
+  - cython
+  - sphinx-gallery
+  - sphinx_bootstrap_theme
+  - pyqt
+  - pip:
+      - "git+https://github.com/santisoler/fatiando@polygon_orientation"