add Lena Hu bio + headshot, update Hao He bio - #302

Changed pages include:

• index.html - view
• davis/index.html - view
• events/index.html - view
• los-angeles/index.html - view
• news/index.html - view
• oss-resources/index.html - view
• posts/index.html - view
• san-diego/index.html - view
• santa-barbara/index.html - view
• about/about/index.html - view

There are more changes not included in the list