Added page for events by country and state.
Changed referral detection slightly for IE compatibility.
Merge pull request #155 from code-dot-org/ie_patch

Changed referral detection slightly for IE compatibility.
More specific CSS selector
Merge pull request #156 from code-dot-org/indiegogo_widget_patch

More specific CSS selector
Merge pull request #157 from code-dot-org/chapterPartners

eu.code.org updates
update link to hourofcode.com
cdo-partners gsheet, removed oracle from eu.code.org
Add google event logging to the three buttons on the two homepage (code & hoc).
Merge pull request #158 from code-dot-org/buttonga

Add google event logging to the three buttons on the two homepages
Use hitCallback to improve google analytics event reporting for the three buttons on the two homepages.
Only downside is no longer able to open in new browser window, since doing this in callback triggers Chrome popup blocker.
Merge branch 'test' into production
hotfix: use eventLabel for google analytics events.
Hotfix: Linked map header to events list page.
Levelbuilder edits
remove teachers and schools handout from hourofcode.com/uk
Add IDs to three buttons on each of the two homepages.  (to assist a/b testing.)
Merge branch 'production' of github.com:code-dot-org/code-dot-org into production
update dates from March to December on uk.code.org
add a couple more level tests