aspnet/Mvc — pull request #1415 by NTaylorMullen (2014-10-20 21:42:18+00:00)
Title: React to case insensitive TagHelperOutput.Attributes.

- Cleaned up some existing bad code that worked around case sensitive TagHelperOutput.Attributes.
- Modified MergeAttributes to be case insensitive when it comes to merging class attributes.
- Added a test to verify the new MergeAttribute case insensitive class merging.

aspnet/Razor#186

**NOTE:** This PR depends on https://github.com/aspnet/Razor/pull/198 being merged.