NDVI statistics changes

* Add a simple jQuery widget to select NDVI dekad from availaibles decads like mapstore NDVI_selector (jquery-mapstore-ndvi-selector.js)
* Changes on geobatch configuration to load DB correctly
* Fix boot on geobatch with 'mvn jetty:run' removing duplicated file loading (applicationContextGBSecurity.xml)
* Add new utilities to DekadUtils and a test for it.
IE modal page fix.

New function in form.js called ajaxRequest to solve this problem. Now it's not simply redirected in IE 8.
Remove duplicated button inside messages jsp
NDVI statistics changes

* Add a file browser for the mask
* Support for custom mask

Also I removed dropdown inside the navigation bar for allow IE 8 use.
NDVI selector for admin GUI revision

Now it loads the dimensions from the capabilities.
NDVI selector fixes on IE

Fixed problem parsing integer starting with 0 on IE versions lte 8
Minor fixes for IE 8