Additions to the website

- [x] treefall info
- [ ] header
- [x] contact information
- [ ] links to original data sheet pdfs
- [x] some figures (plant number by size, location, flowering, etc)
- [x] links to code
- [x] list of all HDP publications 
- [x] list of all hdp datasets
- [ ] public zotero library of HDP publications with link
- [x] bibtext of publications
- [ ] photos of site, team, collaborators 