Made changes to the title page.
More changes to the title page.
Changed defnframe.
The frame title now uses tikz instead of fancybox.

Using some idea from http://www.texample.net/tikz/examples/boxes-with-text-and-math/
Further work on the title page.
Modified readme.
Added the macro definframe.

To use instead of the environment defnframe, and use a normal frame
environment.
support CJK, pdflatex -> xelatex
Merge github.com:rvf0068/nakedbeamer into merge_rvf0068
update README