[Toast] Toast 1.1 released

[Neal E. C. <nea...@gm...>]

This release of Toast features an addition to simplify asynchronous
programming.  It provides an implementation of thread pools of generic
worker threads and message queues to pass work to them.  It provides a
central 'default' worker pool singleton that, if initialized by the
application, may be used in any libraries to distribute all work across the
central pool of threads.  On top of this are implemented promises and
futures.  Additionally anything that was 'thread dangerous' in the library
has now been updated to be thread safe.  The one caveat is that toast no
longer builds with non-mt boost.

Please kick the tires and let me know what you think!