Add the Bootstrap theme test page

This can be used for testing Bootstrap incorporation.

Issue #44.
Add sticky footer to theme page
tools/workflow: Add a dry-run feature

This allows the script to be executed in a manner which only causes the
commands that *would* be run to be printed to stdout, without executing
any of them. For example:

    $ DRY_RUN=1 ./tools/workflow new 10
    git checkout -b wip/10 master
    git push -u origin wip/10

    Execute './tools/workflow close' when completed.

Issue #35.
Rename 'index.php' to 'search.php'

This is so that we can add an index specific to the prototype which
shows a site-map of the available pages.
build: Define 'make local' in www/ directory

This moves the implementation of the 'make local' target from the
toplevel Makefile into the www/ Makefile. Executing 'make local' on the
toplevel calls the target in the www/ directory.