better documentation on compiling/running site locally
gitignore sass cache directory
fix direct editing of css for green header tag
add warning to README about editing css files directly
basic text content for new components and get-involved pages
add screenshots to example components page
move javascript to end of page
"Conference" link in sidebar, to match header nav
new page explaining how to make a Poplus component
Merge pull request #56 from mysociety/components-apply-page

Components apply page