more tests

- added tests for crashstats (look at those bugs)
- added test for handling bad packets
fixed 64-bit problems in crashstats

tools/crashstats.c made assumptions about the size of
pointers that would cause it to fail on 64bit systems.
increment version number
more information in README
ignore tags file
Merge branch 'develop' into release/0.84
Release 0.84

This is the first release with a functioning "crashstats" program on
64 bit systems.