ZoomBox config options.

Now you can add only one action for this plugin.

You must remove the default one with `"removeTools":["zoombox_plugin"]` and append the customized one:

```
    {
        "ptype": "gxp_zoombox",
        "id": "custom_zoombox_plugin",
        "toggleGroup": "toolGroup",
        "appendZoomOut": false,
        "actionTarget": {
        	"target": "paneltbar",
        	"index": 4
        }
    }
```

The options are:

* **appendZoomIn**: Flag to append zoomIn. Default it's true
* **appendZoomOut**: Flag to append zoomOut. Default it's true
Ilike filter for attribute builder

Simulate `ilike` operator for the attribute filter builder on query form. We play with the `matchCase` parameter of `OpenLayers.Filter.Comparison`
Spatial query form fixes

* Export button fixes.
 * Review retrocompatibility for show CSV
 * Allow file export for complex filters
 * New option `exportDoubleCheck`: Flag to make check before export
 * Fixes IE 8 bug on feature grid plugin (on export action)
 * Fix feature grid layout for IE
 * Select `CSV` as default export for the export window.
* Refactor spatial selectors methods
 * Refactor code of the spatial selector methods as widgets instead plugins to fix #339 issue.
 * Optionally add a geometry operation combo for the spatial filter

This commit is related to those issues:

* fixes #335
* fixes #339
* fixes #345
* fixes #346

Also, I've done some changes on wiki pages in order to harmonize with this code:

* [Gecoder plugin](https://github.com/geosolutions-it/MapStore/wiki/Custom-Geocoder-based-on-WFS)
* [Spatial selector query form plugin](https://github.com/geosolutions-it/MapStore/wiki/SpatialSelectorQueryForm-Plugin)
* [Feature Grid plugin](https://github.com/geosolutions-it/MapStore/wiki/Feature-Grid-Plugin)
Remove old code from geocoder

Remove bad lines from the older version of the spatial selectors (when those are plugins)
Translations fixes

Rename spatial selector methods in translation files.
Merge pull request #354 from alediator/spatial_query_form_fixes

Spatial query form fixes
Merge pull request #347 from alediator/ilike_filter_for_query_form

Ilike filter for attribute builder
Merge pull request #344 from alediator/zoombox_options

ZoomBox config options.
added social link url to demo in mapcomposer sample site
Merge branch 'master' of github.com:geosolutions-it/MapStore