Make sure special characters are converted to proper plain text.

Done with mae.

Remove unused exec functions, replace by calls to the respective
stepExec/nextExec, which sets the code level automagically
according to the OperateByInstruction action.

This implementation relies less on the pasted block of text having
a trailing newline.

do not close braces automatically on enter if the next line's indentation
is deeper than the current line's

Reviewed-by: hjk

Adapt to new state model, make sure session is always cleaned
when invoked from processExited event handler, remove calls
to DebuggerManager::notifyXX().

Reviewed-by: mae

one that's less hard-coded.

The remote executable is now read from the debugger argument list

Merge-request: 1562
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

Merge-request: 1537
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

Feedback welcome, some of them are not necessarily better. Some things
aren't solved.