Introduce new typedefs for pthread typedefs in platform agnostic code
Rename WT_DEADLOCK to WT_ROLLBACK, reference #1204.
Merge pull request #1284 from markbenvenuto/pthread_typedef

Introduce new typedefs for pthread typedefs in platform agnostic code
Don't prefix the WiredTiger thread types with an underscore, we don't do it
for any other types.
whitespace
Merge pull request #1288 from wiredtiger/rollback

Rename WT_DEADLOCK to WT_ROLLBACK, reference #1204.