Upgrade gems for 2017-10-09
Upgrade gems for 2017-10-09

Also revert Bundler version to 1.15.4 until new version released.
(New Bundler 1.16.pre.3 disables update warning check.)

Marri/glowfic,Marri/glowfic,Marri/glowfic,Marri/glowfic