fix figure saving
make tex default
Merge branch 'testing' of https://github.com/oerpub/Aloha-Editor into testing
add acitivity stuff to example plugin
Merge branch 'testing' of github.com:oerpub/Aloha-Editor into testing
fix helper label on activities
Selected text should be also TeX by default
fix semantic blocks
Merge branch 'testing' of https://github.com/oerpub/Aloha-Editor into testing
fix figures
Merge branch 'testing' of github.com:oerpub/Aloha-Editor into testing
Merge branch 'testing' into definition-plugin
fix bug in saving definitions