Ver.2018.03.08

[tadfmac]

This pull request includes the following fixes as:

• #25 add internal link to ADS1015 example into gc/top/examples/index.html
• #26 Change the URL of polyfill and driver of jsbin examples from mz4u.net to rawgit
• #28 Delete "Step to stop dphys-swapfile" from setup workflow
• #29 (Re-)Enable Bluetooth of Chromium Browser.
• #30 update node.js from 6.x to 8.x
• #31 Change the URL of deploy zip files from mz4u.net to rawgit
• #32 update version
• #33 add tutorial No.5 to bookmarks