Adding page for UMB (U Maryland Baltimore) camp

Signed-off-by: Amy Brown <amyrhoda@gmail.com>
Merge pull request #431 from amyrbrown/umb-page

Adding page for UMB (U Maryland Baltimore) camp
Adding a page for collaborations
Merge pull request #432 from gvwilson/collaboration-page

Adding a page for collaborations
Added host-manchester@software-carpentry.org as contact
Added host-bath@software-carpentry.org as contact
Added host-ucl@software-carpentry.org as contact
Added host-oxford-dtc@software-carpentry.org as contact
Added host-soton@software-carpentry.org as contact
Merge pull request #433 from mikej888/bootcamps

Added host e-mail aliases