Add missing files

Add missing documentation to the solution file.
Update project GUID.

Author: martincostello

AspNet.Security.OAuth.Providers.sln

@@ -190,6 +190,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "docs", "docs", "{C2CA4B38-A
 		docs\bitbucket.md = docs\bitbucket.md
 		docs\discord.md = docs\discord.md
 		docs\dropbox.md = docs\dropbox.md
+		docs\ebay.md = docs\ebay.md
 		docs\eveonline.md = docs\eveonline.md
 		docs\foursquare.md = docs\foursquare.md
 		docs\gitee.md = docs\gitee.md
@@ -216,6 +217,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "docs", "docs", "{C2CA4B38-A
 		docs\vkontakte.md = docs\vkontakte.md
 		docs\weibo.md = docs\weibo.md
 		docs\workweixin.md = docs\workweixin.md
+		docs\zendesk.md = docs\zendesk.md
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AspNet.Security.OAuth.Basecamp", "src\AspNet.Security.OAuth.Basecamp\AspNet.Security.OAuth.Basecamp.csproj", "{42306484-B2BF-4B52-B950-E0CDFA58B02A}"
@@ -261,7 +263,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AspNet.Security.OAuth.Zende
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AspNet.Security.OAuth.QuickBooks", "src\AspNet.Security.OAuth.QuickBooks\AspNet.Security.OAuth.QuickBooks.csproj", "{815DA59A-E884-4BAD-B16C-D0B550B40A8D}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AspNet.Security.OAuth.Ebay", "src\AspNet.Security.OAuth.Ebay\AspNet.Security.OAuth.Ebay.csproj", "{574A52D9-E7A5-4E11-8F36-5C8AA7033287}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AspNet.Security.OAuth.Ebay", "src\AspNet.Security.OAuth.Ebay\AspNet.Security.OAuth.Ebay.csproj", "{574A52D9-E7A5-4E11-8F36-5C8AA7033287}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution