update master submodule
release 3.1
Revert "release 3.1"

This reverts commit 5cae3c3dc7e2895a39be36c09cc7ba16db4fa2ae.
Revert "update master submodule"

This reverts commit 7b03306670f1485d20cf4d512cd66df79c01db23.
Revert "Revert "update master submodule""

This reverts commit 2a63854797fa6074f526fbfb2338cd079eb3bb10.
Revert "Revert "release 3.1""

This reverts commit cd24ec1b3547beeb7c42907a60c73434f70bd38e.
#539 - point gh-pages submodule at 3.1.1 hotfix
#539 - update gh-pages to 3.1.1
add pay wall
change "downloads" to "releases"
back to downloads
re-add donate links
oops