Removed the RELICENSING FILE and modified .gitignore to ignore
cscope.out.

I removed the RELICENSING FILE. At the time of the fork (09/08/2013)
the parent project (TCC) was under the Lesser General Public License
and the original contributors wanted to relicense it. However, not
all had agreed on that, so the change had not been in effect at the
time of fork, so we inherited the LGPL license.