Implements #58.

All local files can be now opened.
If they appear to be binary and built-in
editor is used, info dialog is displayed.
If it is remote file, it gets transfered
and same decision is made as for local
files.

Added larger icon to pyinstaller build.

Fixed problem with transfer files in executable. #24

Added option to choose transfer files directory to settings.

Merge branch 'master' of https://github.com/BetaRavener/uPyLoader

Merging AutoTransfer and FileListImprovement into master.