#2 various: hex output , line feeds, baudrates, devices, ...

[Frieder Ferlemann]

Hi,

attaching a patch with various changes:

- hex output also outputs printable chars
- additional baudrates are offered (as in termios.h)
- if no devices have been chosen yet /dev/ttyUSB0 is added to default devices
- qtextedit is used instead of qtextbrowser
- new lines injected into the output window have been removed
- scrolling of output window has changed
- message box if a device cannot be opened
- message box if baud rate cannot be set

the patch looks fine to me but I have to admit that I'm not
familiar with QT so I'm not sure it changes everything for
the better:)

Greetings,
Frieder

[Frieder Ferlemann]