version bump

release based on 0.7.8

Merge branch '0.9'

Improvements of build scripts in package.json

v0.7.5.1 is not a legit npm version, thus v0.7.8

Merge branch 'develop'

Ads Modal component

This is same as v0.7.7, but without PWA-changes that can be dangerous
for the current community-app version.

Server rendered: option to inject extra scripts into different locati…

…ons in the template

Update of almost all dependencies to the latest versions

High chances that it will break something, thus spawns a separate branch
for that.