Merge branch 'hotfix/2.1.0'

* hotfix/2.1.0:
  Add update instructions
  Change nuspec dependency versions
  updated documentation
  Remove RC tag, now at 2.1
  BuildSystem update
  Update dependencies
  Limit Iesi.Collections to versions < 4
  Fix for Nuget 2.1 packages
  Renamed Raven UnitOfWork to Transaction
  Documentation update
  Remove Iesi.Collections from web project
  update Raven nuspec to use raven 2.0 - 3.0
  Minor contributions.md changes
  Add build commands to contributing.md
  Add CONTRIBUTING document
  Updated dependences Raven2.0
  Bump to 2.1RC3
update nuget executable
Reintroduced nuget package icons
Up to version 2.1.1
Submodule update
Merge branch 'hotfix/2.1.1'

* hotfix/2.1.1:
  Submodule update
  Up to version 2.1.1
  Reintroduced nuget package icons
Merge branch 'hotfix/2.1.1' into develop

* hotfix/2.1.1:
  Submodule update
  Up to version 2.1.1
  Reintroduced nuget package icons

Conflicts:
	Build/Build.proj
Fix SharpArch.Domain version in nuspec

Copy paste fail.

Smacks self with a frying pan.
Merge branch 'hotfix/2.1.2' into develop

* hotfix/2.1.2:
  Fix SharpArch.Domain version in nuspec

Conflicts:
	Build/Build.proj