Build dependencies by using cmake in a separate dir

Change-Id: I1aafa1aa55c20aa35c6eb43f7fe36bf72ad0debe
Set Python-related variables if they're not set

To avoid having to do multiple tests in other submodules

Change-Id: Ie0b2df3169ca8f3aa75dbd63a5ccce47c02fc452
foo

Change-Id: I2c1fc4b78ccfc1a7d26d93fa5577577171e583e4
Build cCURL for windows

Change-Id: I421605ed3bcaa6fb5f00504a117fb45f41b7cd4f