drop const_iterator
fix copy-n-paste failure for performance-test Jamfile
refactoring of stack-allocators
modify gitignore file
disable example await_emu because of problems with boost::thread
refactored perforamnce tests
adjust stacksize to 64kb required by Windows
use explicit-operator-bool macro from boost::utility
add reference to boost.context docu (supported architectures)
fix class coroutine_context
consolidate operator()( Arg)
fix rvalue references for push()/operator()(Arg)
rework coroutine-ctors (rvalue references)
measure switch with passing arguments
remove optional<> from holder
rename holder -> parameters
remove optional<>
fixx iterator support
Merge branch 'feature/optional' into develop
remove param<>