Play-2.6.x_2.12 migration according to Manual#12

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sovaalexandr wants to merge 13 commits intoedulify:masterfrom

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Commits on Jul 7, 2017

Play-2.6.x_2.11 migration according to [Manual](https://www.playframework.com/documentation/2.6.x/Migration26).
sowhat
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Commits on Oct 23, 2017

Play-2.6.x_2.12 migration according to [Manual](https://www.playframework.com/documentation/2.6.x/Migration26).
sowhat
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Commits on Oct 25, 2017

Bump sbt-plugin version and remove unnecessary dependencies.
sowhat
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MaxmindProvider up to date with new API.
sowhat
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FreegeoipProvider up to date with new API.
sowhat
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Deprecated `GeolocationService` and `GeolocationCache`, introduced `CachedProvider` decorator instead.
sowhat
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Bump sample application code.
sowhat
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Fix deprecated GeolocationCacheTest
sowhat
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Commits on Nov 13, 2017

Modular sub-project based repository structure to be able to add Freegeoip and MaxMind dependencies one at a time.
sowaalexandr
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Commits on Nov 14, 2017

Commits on Nov 17, 2017

Module autoloading
sovaalexandr
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