added initial 2.8 release notes
first draft complete
spelling corrections
Update NuGet-2.8.markdown

fixed the very bottom of the release notes to have 2.8 data instead of 2.7
Update NuGet-2.8.markdown
Update NuGet-2.8.markdown

updated the notes to include:
 - the DependencyVersion Attribute section
 - modification of the -DependencyVersion Switch section to provide the scope in which the feature works.
 - included the major performance improvements in the update-package -reinstall in the Bug Fixes section
Update NuGet-2.8.markdown
Update NuGet-2.8.markdown
Merge pull request #163 from joostdenijs/nuget-2.8-release-notes

pull request reviewed by Howard. Merge it now.
Update NuGet-2.8.markdown
Update NuGet-2.8.markdown

fix some typos
Update Package-Manager-Console-PowerShell-Reference.markdown
Added documentation for -DependencyVersion & -WhatIf switches.
Updated release notes for 2.8 with revised acknowledgements and removal of the webmatrix update
Merge pull request #167 from NuGet/nuget-2-8-allowdowngrade

Merge: Added a snippet about allow downgrade using Update-Package
Merge pull request #166 from NuGet/nuget-2.8-release-notes

Nuget 2.8 release notes
Move 2.8 release notes up top
Update Package-Restore-with-Team-Build.markdown

Fixed some grammar
Merge pull request #168 from azcn2503/patch-1

Update Package-Restore-with-Team-Build.markdown
Fixing typos in release notes