add MMM support to sage-latex.el;
see https://gist.github.com/dandrake/6d7e46f36cecab6d89bc
Change to eval-after-load and don't set mmm-global-mode
Require mmm-mode when compiling (to avoid warnings)
Made C-c C-z run sage (like python-mode)

Fixes part of #40
Change sage-view to use EMBEDDED_MODE for plots

Fixes #41
Updated version
Added tag sage-mode-0.12 for changeset cc468d763ac7