Time Travel and Big O notation

[Magnogen]

I noticed that the time travel section was a little lacking in how it is accomplished - which would be helpful for people who might want to make a compiler or interpreter for DreamBerd.

I added a little section that talks a bit about it, so that they can get an idea. Let me know what you think!

[piperswe]

I'm glad this got clarified, it should make implementation much more straightforward.

[TodePond]

The graph images are great. I'd merge this if the text was greatly cut down - say for example, a table of sorting algorithms available in dreamberd, with a column stating their big-o speed