Make libzpython bindings accept multiple paths when using overrides

docs/source/configuration/local.rst

@@ -81,12 +81,13 @@ are taken from zsh variables.
     but only subdictionaries for ``THEME_NAME`` key are merged with theme 
     configuration when theme with given name is requested.
 
-``POWERLINE_CONFIG_PATH``
-    Sets directory where configuration should be read from. If present, no 
+``POWERLINE_CONFIG_PATHS``
+    Sets directories where configuration should be read from. If present, no 
     default locations are searched for configuration. No expansions are 
     performed by powerline script itself, but zsh usually performs them on its 
-    own if you set variable without quotes: ``POWERLINE_CONFIG_PATH=~/example``. 
-    Expansion depends on zsh configuration.
+    own if you set variable without quotes: ``POWERLINE_CONFIG_PATHS=( ~/example 
+    )``. You should use array parameter or the usual colon-separated 
+    ``POWERLINE_CONFIG_PATHS=$HOME/path1:$HOME/path2``.
 
 Ipython overrides
 =================

powerline/bindings/zsh/__init__.py

@@ -5,6 +5,7 @@ import zsh
 import atexit
 from powerline.shell import ShellPowerline
 from powerline.lib import parsedotval
+from powerline.lib.unicode import unicode
 
 
 used_powerlines = []
@@ -44,9 +45,14 @@ class Args(object):
 	@property
 	def config_path(self):
 		try:
-			return zsh.getvalue('POWERLINE_CONFIG_PATH')
+			ret = zsh.getvalue('POWERLINE_CONFIG_PATHS')
 		except IndexError:
 			return None
+		else:
+			if isinstance(ret, (unicode, str, bytes)):
+				return ret.split(type(ret)(':'))
+			else:
+				return ret
 
 	@property
 	def jobnum(self):