added tremor RV adapter
[150434277] add changelogs
[150434277] moved changelogs to a separate file for each network
iOS - add changelogs
UnityAds adapter version 2.3.0 (UnityAds SDK 1.3.8)
[#150434277] add changelogs:
    added information for the latest supported version of SDK for each adapter
Merge pull request #34 from fyber-lima/fix_unity_150053572

UnityAds adapter version 2.3.0 (UnityAds SDK 1.3.8)
Merge pull request #33 from piotr-ruchwa/master

iOS - add changelogs
Merge pull request #32 from gabriel-fortin/add_changelogs_150434277

[150434277] add changelogs
[#140401020] Final version of tremor adapter v1.1.0
[#140401020] Modified adapters.config to reflect changes in tremor adapter
Merge pull request #30 from marekszulik/master

added tremor RV adapter