add performance tests
documentation of performance
use asymmetric_coroutine<> from (coroutine branch develop)
use symmetric_coroutine<> (from coroutine branch develop)
reduce inecessary code
use ecplicit-operator-bool from boost
allow different stack-allocators
fix returning reference from temporary in sharred_state
fix invalid return type in bounded_queue<>
add missing std::allocator<> to fiber ctor
workstealing round-robin scheduler moved to examples
wait in round-robin destructor until all fibers are finished
reduce loop-count for multithreaded mutext-tests
renaming of fiber classes
add b2 cmd-options to Jamfile
merge from branch feature/tls
 hold main_fiber::ptr_t in round_robin
remove unecessary local data
use priority_queue
resume fiber on creation