#1 multi frame and file patch

[Mark Ng]

this patch allows code-browser to
- open multiple frames on startup specified from user
preferences file so you can do side-by-side edits.
- open multiple files specified from the command line

The patch is done against 1.3

[Mark Ng]

[Mark Ng]

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multi.diff had a bug which crashes CB when the preferences are
reloaded, this is fixed in multi2.diff