add rudimentary testing of our random generator. I've hooked up boost::accumulator which makes it possible to get your FULL STATISTICS GEEK on. I'd love to see covariance tests, chi-square, Kolmogorov-Smirnov.
do a better job at escaping TXT, fixes #795
add recursor txt escaping test
rename ChangeLog to ChangeLog.old

This should prevent Debian and other build systems from picking up
this very outdated file.
Merge pull request #806 from zeha/f/old-changelog

rename ChangeLog to ChangeLog.old
add make dist for travis
Remove ChangeLog from make dist, debian-pdns/rules
fix escaping txt, closes #805 which turns out to have been fixed with the txt escaping fix for recursor
Merge branch 'f/old-changelog' of github.com:zeha/pdns
Merge branch 'travis-makedist'
log previously-seen name in trace
make depth limiter somewhat more sophisticated