CppCMS C++ Web Framework Code

- Fixed use of uninitialized value
- Small optimization of randomization

Removed dead code

An attempt to fix gcc build

Now shared_mutex is recursive under shared_lock calls

Fixed test to ensure that the shared mutex is capable of handling
recursive shared locks according to POSIX standards

- Update copyright notice,
- Moved explicit copyright notice to a singe
file to simplify dual-licensing

Bumped version to 0.999.0 - RC1

- Fixed behavior of application::render() that could override
the "application" assigned to the context
- Added support of using and render blocks
- cppcms_tmpl_cc compiler now provides better error messages
in case of syntax error

Fixed incorrect code in broadcasting

- Fixed problems with tcp-cache storage
- Fixed unit test