CustomProperties
Entity class methods hydrator
Change hydrators
Removes getTextContent() and empty __construct()
Removes DateTime use
Merge remote-tracking branch 'upstream/develop' into feature/vp-102-specificke-vlasnosti-entity

Conflicts:
	src/Vivo/Backend/UI/Explorer/Editor.php
Merge remote-tracking branch 'upstream/develop' into feature/vp-102-specificke-vlasnosti-entity

Conflicts:
	src/Vivo/Backend/UI/Explorer/Editor/Content.php
	src/Vivo/CMS/Model/Document.php
	src/Vivo/CMS/Model/Site.php
	src/Vivo/CMS/UI/Content/Editor/File/WysiwygAdapter.php
Merge pull request #170 from miroslavhajek/feature/vp-102-specificke-vlasnosti-entity

Feature/vp 102 specificke vlasnosti entity