[ease] (57 commits) ...Merge branch 'themes'

[Nate Stedman <natesm src gnome org>]

Summary of changes:

  6eca2a9... Get rid of old constructors (*)
  32fe143... Add the VBox to the window (*)
  d3c8717... Adds the ZoomSlider (*)
  783a501... Adds the ComboBox (*)
  e3e1146... Add the spin buttons (*)
  0901078... Add the buttons (*)
  8476cf7... Add the embed (*)
  0dbf497... Connects the new button signal (*)
  ff86a14... [welcomewindow] connect spin buttons (*)
  bbec4ff... [welcomewindow] Connect the combo box (*)
  eed7e9c... [welcomewindow] Port WelcomeWindow to GtkBuilder (*)
  cc9c822... [welcomewindow] fix an assignment (*)
  9a94eb4... [welcomewindow] Annote a crash (*)
  1eec955... Merge branch 'master' into buidler (*)
  9ae6bfc... Ugly hack to load UI files locally and system-wide (*)
  86d56d2... Fixed hack for loading ui files locally. (*)
  f9939af... Use proper constructor for WelcomeActor text (*)
  075917e... Simplify some code (*)
  320a2a5... Fix segfault. (*)
  87ea4c1... Merge branch 'builder' (*)
  2144cb1... Fixed segmentation fault on Mac OS X. (*)
  d900f0f... gitignore changes. (*)
  def1c76... Fix data_path with system data paths. (*)
  821c23d... [themes] New themes system runs without crashing. (*)
  925b5c6... [themes] Support background colors in themes. (*)
  705996a... [ui] Add padding to the bottom of WelcomeWindow (*)
  c92c97f... [themes] Update example (Transitions.ease) (*)
  e1bb103... [themes] Add theme title and identifiers (*)
  73cbb86... [themes] Add black theme. (*)
  8c99c70... [themes] Fix indentifier setting. (*)
  062f25d... [themes] Make the defaults a little more attractive. (*)
  95d3929... [editor] Propertly recognize edited text. (*)
  ac4edf1... [editor] Fixed handle flipping getting "stuck" (*)
  84c3611... Greatly improved WelcomeActor, with side effects. (*)
  4da6fee... [themes] Fix colors in themes. (*)
  cb1a4b2... [editor] New undo system. (*)
  003e8bd... [editor] Added support for undoing colors. (*)
  68bdd14... [editor] Fix error with 0 msec transitions (*)
  ce04820... [editor] Use Gtk.TreeView for the slide panel. (*)
  cbddf83... [general] Improved temporary directory handling. (*)
  a045e69... [editor] Fixed thumbnail background size. (*)
  b29460c... [welcomewindow] Added border to WelcomeActor (*)
  52dff02... [editor] Allow removal of slides. (*)
  fe182d3... [editor] Redraw slide thumbnails when slides change (*)
  1946d07... [doc] Update SlideButtonPanel documentation (*)
  80b0586... [editor] No reason to keep thumbnail PNGs around (*)
  95ff7ca... [editor] Fix alignment in Cairo rendering. (*)
  9a90ea9... [minor] Remove incorrect comment (*)
  6b94da6... [minor] Default to left alignment if invalid. (*)
  56a40d2... [editor] Allow the user to change typefaces. (*)
  686776d... [editor] Add undo support to font selection. (*)
  5ed4cdd... [editor] Create media directory if it doesn't exist (*)
  83a3de4... [general] Standardize TextElement property names. (*)
  2b8eb9f... [general] Simplify saving/loading of colors. (*)
  2499c26... broken, don't push (*)
  208073d... [themes] Themes persist when documents are saved (*)
  a801f4d... Merge branch 'themes'

(*) This commit already existed in another branch; no separate mail sent