hunspell: ncurses is in system set, hard-enable it
add newt-0.52.12
sys-libs/newt: don't enforce python version

Previously the exheres enforced Python version to be 2.6. That causes
python not found at all. Removing the restriction allows compilation to
work atleast with Python 2.7.

Also disables compilation against Python 3, as it is untested.
Version bump to newt-0.52.14
newt: version bump to 0.52.17
app-editors/vim-runmtime: enable syntax highlighting as default

Change-Id: I3aefbdd8c9c16665b34556457d286cfe62fe383d