Merge pull request #206 from ryanpetrello/next

Store exceptions raised by ``abort`` in the WSGI environ.
Improve performance for general pecan request handling.
Merge pull request #207 from ryanpetrello/next

Resolve a bug in TransactionHook.
More pecan optimizations.
More tinkering on performant Accept method handling.
Merge pull request #210 from ryanpetrello/next

Rearrange quickstart verbiage so users don't miss a necessary step.
Merge pull request #208 from ryanpetrello/perf

Improve performance for general pecan request handling.
Merge branch 'next' of github.com:dreamhost/pecan into next

Conflicts:
	pecan/core.py