#10 Use TMultiReadExclusiveWriteSynchronizer in thread-safe ver.

[Shatl]

1. Use TMultiReadExclusiveWriteSynchronizer instead of
CriticalSection in thread-safe mode. This will decrease
lock wait time in multi-thread environment.

2. Develop additional Thread-Safe wrappers instead of
using $DEFINEs. Sometimes it's nesessary to have both
thread-safe and not thread-safe version of the same
container.

If needed, I can take part in development.