Update README.md
Added limit switch detail image
Merge branch 'hardware-tutorials-dev' of github.com:GoogleChrome/ChromeWebLab into hardware-tutorials-dev
Last LEGO part list added to readme
Switching YouTube links
Fixing typos
Merge pull request #61 from GoogleChrome/hardware-tutorials-dev

Fixes #58 and Fixes #36
Switched order of parts in mindstorms tutorial, moved note from main Sketchbots readme into config file comment, fixed typo in link in sketchbots readme
Merging in dev
added cable schematic
Added cabling schematic and clarified USB/power step
Cropped image
Merge branch 'hardware-tutorials-dev' of github.com:GoogleChrome/ChromeWebLab into hardware-tutorials-dev
Fixing Merge for #36
Merge branch 'master' of github.com:GoogleChrome/ChromeWebLab into sketch-mobile-ui