fixed bug that made camke ignore passed flag

Arguments passed to the configure script had quotation marks.
As a result some flags were ignored by cmake.
removed unused source file (actor_facade.cpp)
Solve issue #103: Does not build on Linux <2.6.17, issue #108: unused_result warning on g++-4.8.1
Merge pull request #109 from adamcavendish/master

Solve issue #103: Does not build on Linux <2.6.17, issue #108: unused_result warning on g++-4.8.1
fixed selection of poll/epoll impl, closes #110

this patch also gets rid of an unused-private-field-warning
when compiling w/o context switching
Make maximum message size configurable.
Merge pull request #112 from mavam/topic/variable-msg-size

Make the maximum message size configurable.
added configureable result buffer size to spawn_cl

This is a new argument for the function spawn_cl. It defaults to zero,
which causes the implementation to calculate the buffer size according
to the number of create work-items.

The simple matrix example sets the buffer size manually.
API refactoring
added pfn_notify callback to print error messages

removed build log from program, since it is printed by the callback
started to re-implement basic libcppa features
remodeled handling of sync. responses
reimplemented delayed send, fixed logging
fixed uniform type name w/ clang & libstdc++
re-organized policy handling
unified handling of timeout messages
bugfixes (passes test_spawn now)
bugfixes for synchronous messages
added runtime-check to spawn for fiber impl

this patch adds a new static member function to `fiber` that
queries whether libcppa was compiled without fiber support
improved logging & fixed mm bug

this bug fixes a bug where the MM accessed a peer object
after it has been disposed