Added new startup argument: '-r', which disables radio control
Fixed broken exchange field TAB press event

- Even while the operator still has an incomplete comment field the fix
  allows to switch back and forth to the call input field
add include guard, sort out #includes, cleanup
put keyer into a popup window

- define keyer window size and position
- pop up a panel at keyer start and hide when it stops
comment usage of cw/digi/phone messages
Fix use of Alt-0..Alt-9 messages

- message[] field had one member to much. Range of input keys was
  also one too wide.
Merge pull request #23 from dl1jbe/new_keyer

New keyer
Convert CALL= from logcfg.dat always to upper case.

- Pierre VE3KTB reported that cqww scoring did not work correctly if
  he enters his own call in mixed or lower case. Thanks for the report.
Merged from upstream/master
Removed fldigi_var_carrier (external) variable, introduced the fldigi_get_carrier()