Pre-release version bump to 0.2.0
Post-release version bump to 0.3.1
Fix for FBTFS in linaro/ubuntu

In file included from sunxi_mali_ump_dri2.c:39:0:
/usr/include/xf86drm.h:40:17: fatal error: drm.h: No such file or directory
compilation terminated.
make[2]: *** [sunxi_mali_ump_dri2.lo] Error 1