Update idisplay license from unknown to gratis

Gratis application, requires purchase of other software to be useful
Refs #8169 and #8213
Update notifyr license from unknown to gratis

Gratis application, requires purchase of other software to be useful
Refs #8169 and #8213
Update nike-plus-connect license from unknown to gratis

Gratis application, requires purchase of hardware to be useful
Refs #8169 and #8213
Update doxie license from unknown to gratis

Gratis application, requires purchase of hardware to be useful
Refs #8169 and #8213
Update dropbox license from unknown to gratis

Gratis application, subscription-based services if desired
Refs #8169 and #8213
Update evernote license from unknown to gratis

Gratis application, subscription-based services if desired
Refs #8169 and #8213
Update ngrok license from unknown to apache

https://github.com/inconshreveable/ngrok/blob/master/LICENSE
Offers subscription-based services if desired
Refs #8169 and #8213
Update toggldesktop license from unknown to bsd

https://github.com/toggl/toggldesktop/blob/master/LICENSE
Offers subscription-based services if desired
Refs #8169 and #8213
Merge pull request #8232 from Amorymeltzer/update-licenses

Update licenses for eight casks