Better support for evaluating arbitrary ink on command line

Merge branch 'master' of https://github.com/inkle/ink

Restore packages (on Mac) by using NuGet.exe when building on command…

… line

Oops, merge error caused a file to get removed from project

Merge branch 'development'

Added xml documentation setting to Release build as well as Debug bui…

…ld, which is what we actually ship. Xamarin prints out lots of lovely warnings for documentation you've missed, so finished doing that, and changed protection level for a few things that don't really need to be public (yet). Altered windows build release script to include that xml in the release zip.

Sublime Text syntax: Change root scope name to be markup.ink rather t…

…han source.ink, so that it doesn't use hanging indents by default

Audit protection level of members in StoryState, and make Story's sta…

…te field public, so game has access to Json serialisation and visit count method.

build_release.command now properly names the windows/linux build

Oops, need to include Newtonsoft JSON dll in the mac release too. Twe…

…aked documentation.