Fixing capitalization
Making rebuild depend on ./index.html
1. Adding syllabus with point-form summary of topics to generic home page.
2. Adding links to reference guides.
3. Putting generic calendar in two-column format.
Replacing 'coffee will be served' with 'coffee break'
Merge pull request #494 from gvwilson/adding-topics-to-standard-homepage

Adding syllabus to default home page.
Merge remote-tracking branch 'upstream/master'

bringing local copy of 'bc' up to date before submitting pull request
minor edits of color reduction routine