Added checks for not well defined expiration date.
Added more methods to cert
Added get_extensions method.
Let tests depend explicitly on their testing library.
Adding a test to the TESTS variable will both build and run it.

Have it so adding a simple test is, uh, simple.
Changed cert_db to use Certificates and log_ids.
Keep entries in DISABLED_TESTS sorted.

Also removed a trailing backslash.
Call evthread_use_pthreads() in all tests.
Add utility for creating the Chrome extension with the EV whitelist.
The protoc compiler has moved from Google Code to github.

Update README accordingly.
Moved database related files to ct/client/db.
Add Paul Hadfield to CONTRIBUTORS.
Merge pull request #311 from phad/master

Add Paul Hadfield to CONTRIBUTORS
TLD checks for common names and dnsnames.