FLUID-5217: Directory restructuring

Reorganized the demos based on comments from the jira and on list.

http://fluid.2324889.n4.nabble.com/Documentation-decisions-td9105.html
http://issues.fluidproject.org/browse/FLUID-5217

There are quite a few changes, including the following:

* path changes
* removed old demos and tests
* added new examples
* promoted ToC manual tests to the demos
* modified the build scripts (src directory is now part of the generated builds).
@amb26 could you let us know what we should be looking for in both of the performance tests.