#254, Turn off GPU Support only for browsers that use WebKit
Print plugin fit to bounding box option

When you activate this option, the print preview is fixed to the actual bounding box and hides the scale.

This commit adds neccesary changes to:

* PrintProvider.js
* PrintPage.js
* PrintMapPanel.js
* PrintPreview.js
* Print.js

Yo can activate this option in Print plugin with  `"bboxFit": true` in mapStoreConfig.js.

This pull request fixes #241
Fixes IE problem on LegendStylePanel.js
Fixed #217: file encoded in UTF-8 with BOM can cause issues on final gxp.js built file
Fixed #230: usage of debug proxy in debug mode also if port changed from 8081
Fixed #256: fixed A3 templates sizes for printing
close #260 . close #249
Merge branch 'master' of github.com:geosolutions-it/mapstore
Graticule tab in print preview.

New widget to control graticule in print preview. Whe can manage this paramaters:

* Activate/deactivate graticule (all other options maybe disabled when this checkbox is not checked)
* Graticule color
* Label style (size, family, decoration: bold and italic)
* Translations

This commit fixes #243.

An example of use it's available in queryConfig:
```
}, {
    "ptype": "gxp_print",
    "customParams":{
            "outputFilename":"mapstore-print"
    },
    "printService": "http://localhost:8080/geoserver/pdf/",
    "legendPanelId": "legendPanel",
    "appendLegendOptions": true,
    "addGraticuleControl": true,
    "legendOnSeparatePage": true,
    "addLandscapeControl": true,
    "actionTarget":{
        "target": "paneltbar",
            "index":4
    }
}, {
```

Also, when you active this option in the print plugin, the `bboxFit` it's also enabled (view #241)
Merge pull request #259 from alediator/241_print_preview

Print plugin fit to bounding box option
Merge pull request #262 from alediator/243_graticule_tab

Graticule tab in print preview
KML/KMZ import fails using a Map reference system different from EPSG:4326 bug. Close #253.
Merge branch 'master' of https://github.com/geosolutions-it/mapstore
InvalidCharacterError on Print in IE. Close #263.
Print plugin minor fix.

Repair javascript error when you haven't any active overlay and your base layer is in `ignoreLayers` parameter
'CanvasRenderingContext2D' is undefined in canvg script in IE. Close #264.
Merge pull request #265 from alediator/print_plugin_fix

Print plugin minor fix.
Security Warning detected from some antivirus. Close #267.
Reverse-Geocoder Tool won't get disabled. Close #213.
Error loading GeoReferences plugin. Close #268.