MappingManager fixes

Removed unnecessary exception for adding inherited classes,  fixed code
so that when child classes are registered, the parents are as well.
Changed SolrFieldModel to immutable.
Upgrade to Windsor 3.2
Upgrade to Autofac 2.6.3.862
Upgrade to Ninject 3.0.1.10
Upgrade dependencies in generated NuGet packages
Don't require restore consent
DateTimeOffset property support
Class names switched
set DateTimeOffset to Utc, test fails in utc negative values (from gmt-12 to gmt-1)
Run tests from fsi
Added client certificate implementation of HttpWebRequest.

Nota Bene -- the certificates must be of type X5092 (vs 1) and must also
contains the private key or the request will fail. Be-aware, if you are
using the windows keystore that you may have to give the running process
specific permissions to "Personal" certificate keystore.
Fix TermVector response parsing
Parsing Solr response correctly when both search results and groups are present
Code reformat
Remove useless comments and commented code
Refactor for clarity
Code reformat; avoid MbUnit-specific attributes
fsi test runner
Revert Gallio/MbUnit changes in e899a861ef117801ab18bade3f3b250312c6ca15
Escape values that containt slash (/) at the begining - SOLR 4 intruduced regex queries and this commit is not introducing this functinoality but prevent breaking old code.