Populate example list exclusively via javascript.

This removes the duplicate logic for populating examples on first load.
Add demo3-specific examples
Allow Examples page to return different subsets of results
Create a demo3 page with different example queries
Start working on dataset table preview
Laurel fixed the schema table output
Striped table, slightly refactor code
Link to more details about dataset. Also, can be copied to be pasted into editor.
Merge pull request #117 from uwescience/ljorr1-tableview

Ljorr1 tableview
update raco submodule: add in const syntax for myrial
Merge branch 'master' into production
Merge pull request #118 from uwescience/production

Production
Merge from origin/master
Update sigma-clipping example
update raco with bugfixes
Add page rank example
Fix capatialization
Merge pull request #124 from uwescience/production

update raco with bugfixes
geographic center of mass
standerdize capitialization