GH #68: DNS::hostByAddress can be slow

GH #68: DNS::hostByAddress can be slow - added parameters in the
interface to pass hint flags to hostByAddress() and hostByName() calls
GH #59: Poco::Environment::osDisplayName()

GH #59: Poco::Environment::osDisplayName() not recognized Windows
8/Server 2012
handler reference counting

- handler reference counting
- parser returns parsing result
FreeBSD network test run
GH #139: FileChannel::PROP_FLUSH is invalid

GH #139: FileChannel::PROP_FLUSH is invalid (contains a tab character)
Removed DefaultHandler typedef

Removed DefaultHandler typedef. JSON::Parser is now default constructed
with built-in parsing handler (i.e. without requirement that user
explicitly provides handler). Handler is now a SharedPtr so old code
with handler on the stack would cause undefined behavior, hence best to
break it now in development release ... apologies to anyone affected.
Merge remote-tracking branch 'origin/feature-json-refcount' into develop
Util alignment with JSON changes
GH #140: Poco::Runnable threading cleanup issue
MSVC 7.1 build fixes
simplify default TCP/HTTPServer construction
updated CHANGELOG
Update CHANGELOG
fixed GH #141: Application::run() documentation/implementation discrepancy
Merge branch 'develop' of https://github.com/pocoproject/poco into develop
updated CHANGELOG