Bumped version to 1.51.

No code changes since 1.50

Merge pull request #23 from xamarinhq/dev

Added a reference to System to support Lazy<T>

Merge pull request #11 from xamarinhq/dev

Some build config updates and a version bump.

Version bump: 1.22

Merge pull request #9 from xamarinhq/dev

Added Xamarin Insights with debug key. Added scripts for injecting ac…

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