Created page for ESA boot camp.
Removed end-date (for one-day camp).
New page for UWaterloo camp
Added a note to clarify that this camp is restricted.
Removed commented out meta tags and updated eventbrite key.
Merge pull request #633 from amyrbrown/wisc

Removed commented out meta tags and updated eventbrite key.
Merge pull request #632 from amyrbrown/vt-rest

Added a note to clarify that this camp is restricted.
Merge pull request #631 from amyrbrown/uwat-new

New page for UWaterloo camp
Merge pull request #630 from amyrbrown/new-esa

New page for ESA boot camp