typos fixed, text reformatted

- added line breaks to reduce dialog size
- simplified parameters in ODECreator

Example:

![before](https://cloud.githubusercontent.com/assets/225266/3301043/5394dc42-f627-11e3-8816-cf804dd326a0.png)

![after](https://cloud.githubusercontent.com/assets/225266/3301046/56c15f30-f627-11e3-9225-5e7d718b8fe0.png)