Add CODESEPARATOR/FindAndDelete() tests
Fix incorrect checkpoint data for testnet3
remove CWallet::AddReserveKey which is never used
remove CTransaction::IsNewerThan which is never used
remove LogException( ) which is never used
remove LookupHostNumeric( ) which is never used
remove GetMedianTime( ) which is never used
remove CPubKey::VerifyCompact( ) which is never used
Remove unused imports in macdeploy script
add DEFAULT_UPNP constant in net

- as this is a shared Core/GUI setting, this makes it easier to keep them
  in sync (also no new includes are needed)
Doc: Always use absolute paths
Remove redundant c_str
Replace non-threadsafe strerror

Log the name of the error as well as the error code if a network problem
happens. This makes network troubleshooting more convenient.

Use thread-safe strerror_r and the WIN32 equivalent FormatMessage.
Replace non-threadsafe gmtime and setlocale

Make DateTimeStrFormat use boost::posix_time.

Also re-enable the util_DateTimeStrFormat tests, as they are no
longer platform specific.
Merge pull request #4152

3e8ac6a Replace non-threadsafe gmtime and setlocale (Wladimir J. van der Laan)
a60838d Replace non-threadsafe strerror (Wladimir J. van der Laan)
Add Tips and Tricks section to README
qt: Periodic language update

Last-minute language update before release 0.9.2.
Merge pull request #4220

c47f537 Add Tips and Tricks section to README (Gavin Andresen)
Fix warning when compiling in OS X
doc: Add historical release notes for 0.9.1