Update README_Windows.md

Add final configuration steps. rake blockly:dev['blockly'] was critical
Update README_Windows.md
Merge pull request #125 from tobyk100/master

Browser warnings.
Hotfix, got rid of silly require statement.
tweaks to recent activity UI
Get rid of browser gem, use user_agent
Merge branch 'master' of https://github.com/code-dot-org/dashboard
Merge pull request #124 from DigiTec/patch-1

Update README_Windows.md
Translations
[Finishes 59583904]: dashboard dialog support for keyboard
Tweak hover state for undone levels
Last level hover tweak
Check for no students assigned
Defer blockly scripts to bottom of body
Analytics partial
Remove empty coffee/scss files
Quote string in config
Loading spinner
Merge pull request #126 from brandonbloom/load-perf

Load perf
Center loading vertically