Improved poor URL entry parsing, added a confirmation alert after upload

M geecon/apps/outpost/constants.py:
	+ SBT_API_COMPLETED: title for the upload confirmation.
	+ MSG_UPLOAD_COMPLETED: Message text for upload confirmation.

M geecon/apps/outpost/model/filesystem.py:
	+ Now uses api_url_re to ensure the api_url is well formed.

M geecon/apps/outpost/model/main.py:
	+ Notifies the application of a completed API request.

M geecon/apps/outpost/regex.py:
	+ api_url_re: A new URL to help prevent dubious configured URLs.

M geecon/apps/outpost/signals.py:
	+ on_api_completed: A new signal for a completed API request.

M geecon/apps/outpost/view.py:
	+ on_blinker_api_completed(): Responds to the on_api_completed
signal with a confirmation dialog box.
Merge branch 'blinker_port' of https://www.github.com/Feastybeast/geecon-outpost into blinker_port