Make where() work with OSX app bundles

MEIPASS is PythonInstaller specific and won't work for py2app

	modified:   lib/util.py
	modified:   .gitignore
	modified:   lib/util.py
	modified:   setup-release.py

.gitignore

@@ -13,3 +13,4 @@ gui/qt/icons_rc.py
 locale/
 .devlocaltmp/
 *_trial_temp
+packages

lib/util.py

@@ -66,8 +66,13 @@ def data_dir():
     if __builtin__.use_local_modules:
         return local_data_dir()
     else:
-        if getattr(sys, 'frozen'):
-            basedir = sys._MEIPASS
+        is_frozen = getattr(sys, 'frozen')
+        if is_frozen:
+            if is_frozen == "macosx_app":
+                basedir = os.path.abspath(".")
+            else:
+                basedir = sys._MEIPASS
+
             return os.path.join(basedir, 'data')
         else:
             return appdata_dir()

setup-release.py

@@ -37,7 +37,7 @@ if sys.platform == 'darwin':
         app=[mainscript],
         options=dict(py2app=dict(argv_emulation=True,
                                  includes=['PyQt4.QtCore', 'PyQt4.QtGui', 'PyQt4.QtWebKit', 'PyQt4.QtNetwork', 'sip'],
-                                 packages=['lib', 'gui', 'plugins'],
+                                 packages=['lib', 'gui', 'plugins', 'packages'],
                                  iconfile='electrum.icns',
                                  plist=plist,
                                  resources=["data", "icons"])),