added postgresql requirement to deps in README.md
updated README.md after PostgreSQL issues during env setup
updated PostgreSQL upgrade instractions
added .bash_profile instructions
Pointing to the correct file and adding the image, refs #76.
adding volunteers to chapter pages
adding Houston chapter to database
Merge pull request #77 from girldevelopit/76-add-favicon

Pointing to the correct file and adding the image, refs #76.
Add rmagick gem to use imagemagick on heroku
Merge pull request #85 from girldevelopit/78-image-resizing

Add rmagick gem to use imagemagick on heroku
Merge pull request #80 from minamarkham/volunteers

adding volunteers to chapter pages
HTX Meetup ID and team bios added
update Stacey's bio and add Facebook link
update Nona's picture
add Stacey's contact information
Merge pull request #84 from joshmedeski/city-houston

adding Houston chapter to database
Add favicon to precompile list
Try precompiling elsewhere
Fix Pittsburgh Chapter's Leader Info
fixed syntax of viewport meta tag