Remove sigplanconf.cls and thrift.pdf.

The license for the cls file is unclear, and the formatted pdf file is
a derivative work.  Therefore, it is probably not safe for us to leave
these in the source tree once we go into Apache.

Also put a reference to the source of the cls file in thrift.tex.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665638 13f79535-47bb-0310-9956-ffa450edef68
3 files changed