Windows full build improvements

<b>Note:</b> No hurry in pulling this in. I will be making some more tweaks and commits in the near future.

`tools\Windows\VS*\BuildDeps.cmd` and `BuildDepsX64.cmd` batch scripts are now broken down into `Debug`, `RelWithDebInfo`, `Release` and `MinSizeRel` versions, the standard build configurations supported by CMake. This roughly halves the initial dependency build time required on a fresh development checkout, when a developer typically wants to get his hands dirty with the RelWithDebInfo build. This breakdown also allows more robust building and switching between different (release) build configurations as the `tools\Windows\BuildDeps.cmd` master script now deploys always the dependencies' DLLs to Tundra's bin directory without need to tweak the script manually.

In addition to this, Ogre's dependencies are now build from the source repository instead using zip package.