New gallery with moar examples

[thoughtpolice]

Matt originally had a small gallery of examples of Vacuum output, including sequences, difference lists (dlists,) and a simple example of Data.List.transpose. See here:

http://web.archive.org/web/20100410115820/http://moonpatio.com/vacuum/

I've started a basic gallery inside the main repository with only a simple example (the output of the list [1, 2],) but really the gallery should be on the gh-pages branch with a page for each data type, with several examples of each.

Some simple examples of data structures that would be cool to visualize with various combinators:

• vector
• containers
• dlist
• unordered-containers (HashSet, lazy/strict HashMap - also Johans' HAMTs)
• Data.Sequence (or perhaps generally a finger-tree)
• Data.List
• JSON (aeson?) for a simple type
• FGL or a graph library
• A priority queue (millions of choices)
• A zipper (millions of choices)