extended ascii char. from keyboard are ignored

[atao60]

When playing notes with computer keybord, neither extended ascii key nor dead key
can be used for mapping.
Then, e.g. with a french azerty keybord, only the bottom set of keys is usefull.

There are in fact two different issues :

• the extended ascii keys : only one line of code has to be changed!
  In brightonControllers.c, inside brightonMapKeyboard method, the "from" variable
  must be declared "unsigned char" in place of "int".
  That's it! Well almost: the profile file must be coded in any kind of iso 8859
  to get extended ascii characters on one byte.

To use UTF 8 coding (or any other multi bytes coding), (unsigned) int or char
declarations would have to be replaced by wchar_t. That's an other story.

• the dead keys (on a french azerty keyboard, the key "^" between "p" and "$" is one of them...)
  Here a list of substitutions is needed. Can be done by adding a dynamic array to brightonWindow. It's not
  very clean but it avoids any other change of existing struct definitions. To fill this
  array, add a optional fourth field to "KM" records in the profile file.

Solve the first issue would be already a big step forward, for a very little price.

See #93 extended ascii char. from keyboard are ignored

[atao60]

Thanks for having migrated bristol to Github.

Pull request will follow for the above issue.