renamed emboss to extrude
Merge branch 'master' of github.com:jdan/isomer
Revert "Merge branch 'master' of github.com:jdan/isomer"

This reverts commit 954104ba3deea14365490958475bd94fdc4b8c3a, reversing
changes made to bcb83c706415e1c4183102b31c610a7a9bd3dad9.