Add MR_QCOM_OVERLAY_HEADER

If set framebuffer_qcom_overlay.c will include the custom header
Merge pull request #20 from KINGbabasula/master

Add MR_CUSTOM_OVERLAY_HEADER
Throw error if MR_QCOM_OVERLAY_HEADER is not defined when using overlay
Adjust padding of ROM items in listview
Specify fb_text sizes on 1/4 of a point

* Helps with scaling of long ROM names