Add checks for homebrew python on OS X.

modules/python/init.zsh

@@ -11,6 +11,16 @@
 if [[ "$OSTYPE" == darwin* ]]; then
   path=($HOME/Library/Python/*/bin(N) $path)
   manpath=($HOME/Library/Python/*/{,share/}man(N) $manpath)
+  _brew_py="/usr/local/share/python"
+  _brew_py3="/usr/local/share/python3"
+
+  if [[ -s "$_brew_py" ]]; then
+    path=("$_brew_py" $path)
+  fi
+
+  if [[ -s "$_brew_py3" ]]; then
+    path=("$_brew_py3" $path)
+  fi
 else
   # This is subject to change.
   path=($HOME/.local/bin $path)