Hi
Yep, the lightmapping has been added recently, however it shouldnt be in one texture, but please use 2 textures (1-color , 2-lightmap)
in Mesh Editor you've got 2 types of light (Ambient + Directional) both you can set through Menu\View
when testing lightmaps you may want to disable both of the lights : so set Directional to "off" and Ambient to "0"
camera works in spherical mode, you've got focus point from around which you rotate the camera
you can rotate the camera with Win key (or Middle Mouse Button, or through 5th mouse button)
you can zoom with mouse wheel (this will close you to the focus point, but its not moving forward)
moving the camera is done with space key, or with 4th mouse button