Add install declarations for AutoTesting and AutoNet
Altered name of a local static to make it more memorable
Move header install to root CMakeLists.txt

Headers from all targets are stored here, so it shouldn't be
associated with a single target.
Remove target for json11

json11 source files are build with AutoNet
Adding a static type to CoreContext to allow easier debugging
Adding .nuspec, .targets. and .natvis files for VC++ developers

Natvis will allow the majority of the most important Autowiring types to be directly visualized.  This includes the contents of CoreContexts, status visualizations on individual threads, and content inspection of AutoPackets.
Merge pull request #144 from leapmotion/fix-cmakeexport

Fix installation and export for Autowiring
Merge pull request #143 from leapmotion/ref-localstatic

Change name of CurrentContext static variable
Merge pull request #145 from leapmotion/feature-nuget

Add Natvis configurations to allow Autowiring to be visualized in MSVS
Merge pull request #146 from leapmotion/ref-staticdbg

Add a static type to CoreContext to allow easier debugging
Bump autowiring version to 0.2.3
Making use of NuGet on Windows to download boost

Also updated ignore list, because this downloads a ton of stuff into the working directory when configuring in-source.
Correcting Windows compiler errors