Markup URL, fixes #11
See #25: Fix some common 404;
Deleting robots.txt
Merge pull request #36 from chernjie/master

Marking RSS feeds as gone. See #25: Fix some common 404;
Merge pull request #35 from hackerspacesg/url

Markup URL, fixes #11
Merge pull request #38 from ValentineC/master

minor content edits to calendar for clarity
Updated post office and exercise locations.
Merge pull request #39 from robertsky/master

Updated post office and exercise locations.