The user can specify a tigervnc configuration file as an argument to the
viewer. Previously the viewer assumed this to be a server, but now we
will first check if there is any file matching the given argument. If
so, try to load the content of that file, like we normally do.

Fixes issue #38.

Fixes issue #616

Menukey was broken by recent refactoring of OptionsDialog

Various errors exposed when connecting to RealVNC servers
on alternative platforms (ARM, SPARC).  SSLEngineManager
was also cleaned up but most of the changes are cosmetic.

See issue #534

Changes to keyboard handling require methods from the KeyEvent
class that were not introduced until Java 7.

Java L&F has pre-defined hook that transfers the focus to the
menu of the RootPane.  Since the viewer doesn't have a menu
this just causes a loss of focus and subsequent unexpected
behavior of keyboard and mouse.

See issue #505

Need to be careful with escapes though.

Some servers respect the ordering of pseudo-encodings as well, so
make sure we list the best one first.

Alpha cursors are not supported in java on Windows so disable
it in that case.  Ideally it would be nice to be able to test
whether or not the client OS supports it, but at the moment
MS Windows is the only one that I'm aware of that doesn't.

a java.nio.BufferOverflowException while the same parameter specified
as "-param=value" worked fine.

Mentioned in issue #38

Also, delay showing DesktopWindow until first valid rect has been
recieved.  This allows for a ClientRedirect to take place before
any data rects have been received.

Adds multi-threading, more robust support for different pixel formats,
and several new runtime options.

Sync various methods and filenames with C++ versions