* jquery.tablesorter.js:
* jquery.tablesorter.min.js: now using "stupid table", that fixes the
row additions and deletions
* ChooseADate.aspx: Page to choose a date between valid candidates
* YavscModel.csproj:
* FreeDate.cs: a free date
* FrontOfficeApiController.cs: cleanning using clauses
* FrontOfficeController.cs: - cleanning using clauses
- check user role before editing the model object
* GoogleController.cs: view "ChooseADate" in successfull response to
"DateQuery"
* WorkFlowController.cs: check user's role to drop the estimate.
* Estimate.aspx: * now using "stupid table", that fixes the row
additions and deletions.
* the user interface more intuitive at row deletion
* DateQuery.aspx: changed the query parameters
* Web.csproj: google date + stupidtable - tablesorter
* IContentProvider.cs: cleaned an unused "using" clause
* WorkFlowManager.cs: cleanning spaces
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