make save dlg centered even with non-default res
allow symlinks in bin/data
Merge remote-tracking branch 'upstream/master' into fix_dialog_centering
Merge pull request #799 from myk002/fix_dialog_centering

Fix save dialog centering
quiet -Winline and -Wshadow warnings
quiet sign-compare warnings

it would be better if these were fixed, but they haven't caused many
probems so far, and unless avoiding these warnings were accepted as policy
by the project, they'd just keep on cropping back up
fix gcc warnings

fixed for -Wunused-variable, -Wwrite-strings, and -Wreorder

also fix c++11-only-style non-static data member initializers, which
older compilers won't support
fix out of bounds error