testPutBadETag is sending an ETag header

I think the right header to send the etag value should be If-Match.
Merge pull request #55 from fserena/patch-3

testPutBadETag is sending an ETag header
remove duplicate testAcceptNonRdfPost

Remove unimplemented method testAcceptNonRdfPost() from
CommonContainerTest as it's already being tested in
NonRdfSourceTest.
Merge pull request #56 from spadgett/master

remove duplicate testAcceptNonRdfPost
get rid of duplicate Slug header test

We had both testServerHonorsSlug and unimpelemented testAllowSlugUri.
We only need one test for Slug headers.
Merge pull request #57 from spadgett/master

get rid of duplicate Slug header test
Add List of Test Cases that need to be Implemented into the Coverage
Report
Merge pull request #58 from ttsanton/master

Add List of Test Cases that need to be Implemented