integrated some changes from GH# 249
fixed GH# 251: HTTPStreamFactory::unregisterFactory missing implementation?
fixed GH# 252: Unsupported data type "NUMERIC" in SQLite
Preserve file permissions on Unix FileImpl::copyToImpl
Add RemoteSyslogListener::LOG_PROP_APP and RemoteSyslogListener::LOG_PROP_HOST so that we can more easily access these special log message properties.
* Method to get JSON object value using Poco::Nullable
added ColorConsoleChannel and WindowsColorConsoleChannel classes
fix cmake build system; fixes #274
Merge pull request #275 from saschazelzer/274-cmake-build-system-broken

fix cmake build system; fixes #274
Prevent warnings by removing parameters from methods that don't use them.
Fix #279 by not checking CMAKE_BUILD_TYPE when setting CMAKE_DEBUG_POSTFIX.

CMAKE_DEBUG_POSTFIX is already build-type specific and only applied
in case of "Debug" builds. The build-type is correctly inferred from
either CMAKE_BUILD_TYPE for MAkefile based generators or the selected
build type in the Visual Studio IDE. This fix allows to switch the
build type in Visual Studio and have Poco compile/link correctly.
Poco::UUID::tryParse() now accepts UUIDs without hyphens; updated documentation (fixed links to specs)
Merge pull request #280 from saschazelzer/279-cmake-debug-postfix

Fix #279 by not checking CMAKE_BUILD_TYPE when setting CMAKE_DEBUG_POSTF...
Check for ODBC headers in addition to checking for odbc_config tool
Merge pull request #285 from nocnokneo/check-for-odbc-headers

Check for ODBC headers in addition to checking for odbc_config tool
Merge pull request #256 from syvex/hotfix/UnixFileCopyPermissions

Preserve file permissions on Unix FileImpl::copyToImpl
Merge pull request #257 from syvex/feature/RemoteSyslogListenerAppAndHost

Add RemoteSyslogListener::LOG_PROP_APP and RemoteSyslogListener::LOG_PRO...
Merge pull request #277 from patrickjwhite/unused-vars

Prevent warnings by removing parameters from methods that don't use them...
fixed GH# 259
fixed GH# 262