Add alignSelf nad flexWrapBefore in the flexbox examples
Some test fail with quite close calculations. Use eps.
Fix flex grow making last items with flexGrow 0 to shrink due to rounding, happy tslint
Items now appear, but they should initially shrink and they don't
Add 15-ish tests for flexbox layout
Port reasonable flexbox test set
Fixing issues, adding unit tests
Moved from .tsx to .ts and used our ui/builder.parse
