Merge branch 'master' into development
updated links on 2013 schedule

and added jemoji to config file
updating schedule format
minor
removed sessions that are missing

## Currently missing:
-   More stochastic simulation models and an example ([Jim
Scott]({{site.url}}/people/))
-   Hargrove/Williams session - to be combined w HIV spreadsheets
-   Discussion: Assigned reading ([Jim Scott]({{site.url}}/people/))
field trip location
minor
minor
Merge branch 'development'