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- setuplib.sh: readUserInput function now allows to optionally use the escape key to abort input.
               The function has been renamed to readUserSelection to force incompatibility.
- All other scripts have been updated accordingly.
- It is now possible to use user input 'q' in interactive menus.
- All script parameters '-q' (short for --quit) have been removed.

- the version of a new installation is now printed even if this is the first installation (PATH variable not updated yet)
- fixed the recent fix for when .bashrc is no file but a link (not all cases were fixed)

Merge branch '2-gccsetup-sh-doesn-t-follow-symlinks-when-appending-gcc-configuration-to-bashrc' into 'master'

Resolve "gccsetup.sh doesn't follow symlinks when appending gcc-configuration to .bashrc"

Closes #2

See merge request !1

If no 'local' installation of stm32flash (in Host/Source/stm32flash) is detected, the script now tries to use a system-wide installation.

introduced the USER_CFLAGS variable to all modules makefiles, so users can add custom compiler flags