fix #66: color scheme is modified twice

When color scheme is modified by another package (such as SublimeLinter), Colorcoder should not modify it again.
Currently, Colorcoder added its scopes and appends "(Colorcoded)" to color scheme name.

colorcoder.py

@@ -177,15 +177,15 @@ def panel_callback(self, text):
     def maybefixscheme():
         set = sublime.load_settings("colorcoder.sublime-settings")
         if set.get('auto_apply_on_scheme_change'):
-            if sublime.load_settings("Preferences.sublime-settings").get('color_scheme').find('/Colorcoder/') == -1:
+            if sublime.load_settings("Preferences.sublime-settings").get('color_scheme').find('(Colorcoded)') == -1:
                 colorshemeemodifier.modify_color_scheme(set.get('lightness'),set.get('saturation'))
 
     @staticmethod
     def modify_color_scheme(l,s,read_original = False):
         read_original = read_original and sublime.load_settings("Preferences.sublime-settings").has("original_color_scheme")
-        if read_original and sublime.load_settings("Preferences.sublime-settings").get('color_scheme').find('/Colorcoder/') == -1:
+        if read_original and sublime.load_settings("Preferences.sublime-settings").get('color_scheme').find('(Colorcoded)') == -1:
             read_original = False
-        if read_original and sublime.load_settings("Preferences.sublime-settings").get('original_color_scheme').find('/Colorcoder/') != -1:
+        if read_original and sublime.load_settings("Preferences.sublime-settings").get('original_color_scheme').find('(Colorcoded)') != -1:
             print("original theme already colorcoded, abort")
             return
         global modification_running