Removed unnecessary AJAX fallback

Compatibility with IE6 has been dropped from
SimpleJS, so this bit of code is no longer needed.
Removed definition of $ alias

The dollar sign alias was admittedly a bit of a
bad idea to use as it will likely clash with other
frameworks, so it has been removed.
Removed first letter capitilisation from Simple functions

All functions in the Simple namespace have had their
first letter's changed to lowercase. This was done
to conform to the common JavaScript convention.
Renamed Simple.sprintf() to Simple.format()

This function has been renamed because using "sprintf"
was ambiguous, and kind of silly. The name
"format" was chosen because of the similarity in
behavior and use to the Python string method
of the same name.
Bug fix caused by the previous function renaming

One of the calls to "Simple.isArray" did not get
renamed in the previous commit. This has been fixed.
Renamed Simple.domReady() to Simple.ready()

This was renamed for the sake of brevity, and because
"domReady" is an ugly function name.
Renamed Simple.domElement() to Simple.element()

This was done for the sake of brevity, and because
"domElement" is an ugly function name.