terminal.js:  Fixed a bug with `GateOne.Terminal.highlight()` where you'd lose your text selection immediately after selecting something in the scrollback buffer.  This required a minor change to the Web Worker (see below) as well.
term_ww.js:  Modified `processScreen()` to wrap every line in the scrollback buffer in a '<span>' element.  This was part of the aforementioned bug fix in regards to text highlighting inside the scrollback buffer.