Removes security.service

Merges into user.service, moves the umbraco.security module into
umbraco.services, instead of in the root module, we could consider
doing that for umbraco.resources as well.
Fixes U4-2488 Edit datatype: Media Picker appears incorrectly
Fixes: U4-1027 Media Sort Usability -> changed the sorting to use Web API instead of asmx web service.
Started converting content model mapping over to use AutoMapper to fix the composite tabs/properties. New unit tests for the mapping as well.
Finished content and media model mapping using AutoMapper and now the tabs display composite properties correctly.
xmlrpcnet was missing from nuspecs
Increase version to 6.1.4
Fixed up BaseDatabaseFactoryTests so that it only loads in one db factory with the correct conn strings, now we can easily override to use a custom db. Added benchmark tests for bulk inserting records for the cmsContentXml table which shows how we can improve performance quite a bit especially for larger node sets. Added more unit tests for bulk inserting and fixed it up a bit more.
Merge remote-tracking branch 'origin/6.1.4' into 6.1.4-cmsContentXml_Optimizations
Cleanup of unused using statements in a few files
U4-2543 In the back office its possible to get Response Validation errors
U4-2550 Could not load file or assembly 'HtmlAgilityPack, Version=1.4.5.0
Merge branch '6.1.4' of github.com:umbraco/Umbraco-CMS into 6.1.4
Adds manual tabs to the header tab collection
Added directives, filters and resources to doc generation
Removed trailing space from ngdoc declaration
Merge branch '7.0.0' of https://github.com/umbraco/Umbraco-CMS into 7.0.0

Conflicts:
	src/Umbraco.Web.UI.Client/src/common/services/util.service.js
	src/Umbraco.Web.UI.Client/src/routes.js
Fixed what the merge before broke
Implements the bulk insert procedure for re-populating the cmsContentXml tables, removes the need to rebuild all xml structures when sorting if in LB environments
Updated the RebuildXmlStructures method with performance improvements. Added cache checking to the GetByPublishedVersion method since published content should always be 'latest' this will speed things up tremendously if items are found there. Added 2 more performance tests which show very large perf improvements, namely the Get_All_Published_Content_Of_Type shows a 77% improvement.