Merge pull request #14 from mroberge/master

update development branch.
added download; disabled flags

1.  removed the "Intro" menu item; changed "About" menu item to contain
former intro text, and some links.
2.  Added a download link that creates a *.csv file and downloads it.
This works in Chrome, but not in IE or Firefox. Nothing happens.
3.  Disabled the custom Events.  They weren't supported by IE, which was
causing a bug.  And I wasn't using the events anyway. I created them so
that a new hydrograph would be drawn immediately, but dropped that.  If
I set up using a MVC framework, then this sort of issue should be taken
care of.
Update spec.reusableScatterChart.js
Update spec.reusableScatterChart.js
updated the specs
updated libraries

updated D3, jasmine, and jquery. Added bootstrap.
Merge pull request #16 from mroberge/development

Development
Merge pull request #17 from mroberge/Start-TDD-for-real

updated libraries
put js files in new src/ folder; set up jasmine, updated refs to libraries.
merge earlier changes to master branch to TDD
Merge branch 'master' into Start-TDD-for-real
Merge pull request #20 from mroberge/master

update pages