Temporarily reverting Single/Take SQL support
Cadbury's Options: just 40 calories per cup! (Updates to DbContextOptions)

This change looks big, but a lot of it is trivial changes to naming. The significant changes here are:
- Collapse DbContextOptions and DbImmutableContextOptions into one class
- Allow for generic DbContextOptions so that different options can be created for different contexts
- Get this options object from the service provider if it one is available. This will theoretically work with the options stuff happening elsewhere
Simplify Visual Studio build steps

New steps:
1. Run `build initialize`
2. Open solution
Convert .csproj files to portable class libraries
Add csproj to sln and add skeleton code rowanmiller
Beginnings of a provider for Azure Table Storage.

Add null checks on public interfaces.
Batching is now configured per context.
Wrap Azure SDK in more testable interfaces and wrappers. Fix async issues on fetching
Update datastore to match new API.
Minor tweaks. Change batching setup to use configuration.
Whitespace fixes (R# code cleanup)
Implement HasTables. Add strings resource and check utilities. Wrap the CloudtTableClient in a testable interface
Add TODOs and more whitespace corrections
Culture invariant dates and other minor tweaks.
Add functional and unit testing to ATS requests. Enhance error handling.
Merge pull request #181 from natemcmaster/ats

Beginnings of a provider for Azure Table Storage.
Adds support for server-side filtering of data types supported by ATS.
Rebase on dev