Screenshot popup alert

This feature adds a screenshot alert to Sugar.
On pressing <Alt>+1 key or selecting 'Take a screenshot' option from bottom toolbar
generates a popup alert where user can change the default name of that screenshot.
The popup can be dismissed by clicking 'X' button or by pressing 'Escape' key.

Currently there is no notification on screen capture in Sugar.
The user wants to rename the screenshot, he has to go back to Journal to do it.
This feature solves the above problem.

Author: iamutkarshtiwari

extensions/deviceicon/display.py

@@ -34,7 +34,7 @@
 
 from jarabe.frame.frameinvoker import FrameWidgetInvoker
 from jarabe.model import brightness
-from jarabe.model.screenshot import take_screenshot
+from jarabe.screenshotpanel.gui import ScreenshotPanel
 from jarabe import frame
 
 
@@ -230,7 +230,7 @@ def __screenshot_cb(self, palette):
     def __take_screenshot_cb(self, frame_):
         if frame_.is_visible():
             return True
-        take_screenshot()
+        panel = ScreenshotPanel()
         frame_.show()
         return False
 

extensions/globalkey/screenshot.py

@@ -15,10 +15,10 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
-from jarabe.model.screenshot import take_screenshot
+from jarabe.screenshotpanel.gui import ScreenshotPanel
 
 BOUND_KEYS = ['<alt>1', 'Print']
 
 
 def handle_key_press(key):
-    take_screenshot()
+    panel = ScreenshotPanel()

src/jarabe/Makefile.am

@@ -1,9 +1,10 @@
 SUBDIRS = 		\
-	controlpanel	\
+	controlpanel    \
 	desktop		\
 	frame 		\
 	journal		\
 	model		\
+	screenshotpanel    \
 	view		\
 	intro		\
 	util		\

src/jarabe/screenshotpanel/Makefile.am

@@ -0,0 +1,5 @@
+sugardir = $(pythondir)/jarabe/screenshotpanel
+sugar_PYTHON = 				\
+	__init__.py			\
+	gui.py				\
+	toolbar.py

src/jarabe/screenshotpanel/__init__.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2016  Utkarsh Tiwari
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# Contact information:
+# Utkarsh Tiwari    [email protected]