Reviewed-by: Tobias Hunger <qt-info@nokia.com>
Task-number: QTCREATORBUG-2542

Do an initial connection check on the host
(once per host). Add utility function to
NetworkProtocol, displaying connection check
message box.
Move the 'Paste' handling into the PasteView
dialog, such that the checking happens there
and the dialog stays open if something fails.

Task-number: QTCREATORBUG-2117

Point user to settings if something goes wrong.

Replace deprecated QHttp by QNetworkReply.
Implement listing functionality, fix fetch
encoding.

that is shared and provides delayed creation.
Add "Paste clipboard" option.

-Pass simplified type based on mimetype to paste for highlighting.
-Remove QHttp from CodePaster and pastebin.com in favour of QNetwork.
-Implement new pastebin.com protocol
-Implement listing via parsing the HTML-page for pastebin.com

Some categories do not have icons yet, unfortunately.

Introduce capabilities flags for Protocols, disable controls
in Pasteview accordingly. Work towards making PasteBin.com
work.

- Put classes into namespace.
- Fix settings not storing the selected protocol.
- Refactor settings by introducing standard handling.
- Create PasteSelectDialog class and fix list/refresh handling.
- No longer stuff the QListWidget into the protocol for listing, wire
via signals.

QString: Use QChar where appropriate.

check for errorstring of the correct variable

each protocol needed to create the editor on their own.
Instead emit fetchDone and let the plugin instantiate it for
every protocol

- created protocol class as basis for different paste servers
- removed custom classes and replaced functionality with
  simple QHttp* usage
- removed poster and fetcher classes copied from cpaster
  application. It not getting updated anyways in creator
- Known issue: Listing does not update, when user changes
  protocol
- TODO: add pastebin.ca support. Code is done already, just
  needs to be placed inside plugin.