wym.js: improved nested lists support. Added some helper functions.
wym.js: improved nested lists support. Added some helper functions.

mrlundis/wymeditor-legacy,samuelcole/wymeditor,samuelcole/wymeditor,mrlundis/wymeditor-legacy,mrlundis/wymeditor-legacy,samuelcole/wymeditor,samuelcole/wymeditor,mrlundis/wymeditor-legacy,samuelcole/wymeditor,samuelcole/wymeditor