The control div is now an empty container that we can always append to and
remove from without having to worry about GMaps changing styles on it. It
also makes sure that the control is appended before Google's own
attribution control, so the "Report a map error" link will always be
clickable.
Simple and effective: As soon as a map has a Google layer, the whole map viewport is added as control to the GMap. As soon as no Google layer is visible on the map any more, the map viewport is appended to the map container again. With this change, OpenLayers strictly limits its GMaps integration to the GMaps API.
Also note that there are no css overrides for the attribution any more. Instead, controls can now be conditionally positioned differently for Google layer by using the .olForeignContainer selector.
Calculating pixel positions from origin and grid index causes alignment
issues in the grid. By going back to incremental positioning, we get a
result without blank spaces between tiles again.
This also fixes an issue that has gone unnoticed for a while: the grid did
not cover the bottom of the map viewport, but instead covered an invisible
area above the top of the map viewport.
Now we also do not use deltas for shiftRow and shiftColumn. Some
refactoring was done so we do not need different calculateGridLayout
methods for layers with top-left and bottom-left tile origin.
TODO: With this commit, ArcGisCache and KaMap layers are broken.
The [URI standard](http://tools.ietf.org/html/rfc3986#section-4.2) allows for URI without a scheme. Where http is used to load the app, using a schemeless URL for the Bing metadata loads a script using http - and the same goes for https.
This is because the threshold used for deciding when a column or row is shifted is too far to the bottom right. A tiny fix, but effective. A new test makes sure that we don't shift columns more than necessary when the layer is dragged.
If a layer is configured with serverResolutions, then getServerZoom should return the zoom level as index of the current resolution in the serverResolutions array.
