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.

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

This is the first of several large commits intended to resolve a
number of problems and add new capabilities to the java viewer.
Among the most significant changes are a complete re-design of
the options dialog, which has been converted to a callback style
interface.  The look & feel of all dialogs are now similar to
the style of the native viewer now.  Also, the process by which
new viewers are spawned has changed and each viewer is a completely
separate process, allowing for runtime arguments to be handled
statically.

Fixes numerous problems with the SSH tunneling implementation
on the java viewer and adds many significant new SSH-related
features.  SSH tunneling is now highly configurable via the
both the command line and GUI. The embedded client can parse
openssh config files.  An external client may be specified,
along with a custom arguments template.