Bump nomlib version to 0.9.1
Introduce run-time user path for OS X

* TTcards was relying on a build-time cmake variable that made it unable
to be distributed as a pre-release binary, due to my $HOME path being
hard-coded into that binary. This lets me issue a 0.9.1 hotfix for
TTcards that can determine the proper user path at run, which should
be $HOME/Documents/ttcards.
Merge branch 'hotfix/v0.9.1'