Enter Key Handler

[FredCK]

Every browser has it's own behavior when users press the [Enter] or [Shift]+[Enter] keys. The main problem with it is that they output completely different HTML.

Another important thing is that users want to customize the output produced by the editor to their own needs. Some want the editor to produce paragraph tags (<p>), while others prefer simple line breaks (<br>).

We are proposing a new system where the editor controls the enter key, overriding browser's actions (don't trust in browsers!).

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Depends on: #17, #18

[FredCK]

The feature is implemented. We should now start the testing phase. Now, whenever possible, we should concentrate all our efforts on it, as this is a critical feature and a very delicate piece of code.

[FredCK]

Bugs on this one should be now reported separately. I'm closing it as a first implementation has been completed.