- Shamelessly stole a simple Java agent from a blog post, started making modifications to test it.
- Added libusdt to the repository for future use.

NOTES:

Some initialization code appears to be broken (output/method_test.txt):

c: AddCapabilities failed: 98
c: SetEventNotificationMode(METHOD_ENTRY) failed: 99
c: SetEventNotificationMode(MONITOR_WAIT) failed: 99
c: SetEventNotificationMode(MONITOR_WAITED) failed: 99

Also, a number of warnings in printf() formatter strings discouraged me from trying to use -Werror, although we should switch to that eventually.