Add initial support for uploading data to HydroServer

jirikadlec2[CodePlex]
To support Hydroserver data management and sharing of modeling results, a new feature is requested in HydroDesktop:

Initial steps:

Create a new DataUpload plug-in This plug-in adds a new button quotUpload to Serverquot to the Table tab.
When the user clicks the button the quotServer Informationquot dialog with text box for URL, user name and password is shown. This dialog also has a quotSave authenticationquot check box so that users don't need to re-enter this information next
time. HydroDesktop connects to the server and verifies if the server supports data uploading.
A quotConfirm data uploadquot form is shown. This form shows the list of currently checked time series.
After confirming, HydroDesktop calls the Data uploading web service on the server. The uploading is done in a background thread, showing progress and estimated remaining time.

Note:
The detailed implementation of the data uploading web service is still in progress. A testing user account and a demo Hydroserver link will be provided before 20th May.

The initial design of the UI including the feature to remember previously entered server information can already be started now.

Start by locating the Table tab and the existing plug-in structure in HydroDesktop. Review how current dialogs handle server information and saved authentication, then map the requested DataUpload plug-in, confirmation form, and background progress behavior; completion depends on the still-in-progress data-uploading web service.

Written by the indexing model from the issue text.