Added option for adding/modifying user api keys
removed the method for adding api keys by user
ui added for api settings
Undo on last commit and hided reload and settings area
CMakeLists.txt modified to have the correct information about the extension
ENH: Issue 6 fixed. Progress bar is open until downloading images is finished. Also the messages on progress bars is more informative.
move close progress popup inside try
fixed issue #5: http errors should be reported to the user via popup
Merge pull request #1 from mehrtash/master

Pull request to merge latest changes before publishing the module in Slicer extension manager.