Initial version of the GridLayout control

[hugoabernier]

Q	A
Bug fix?	[ ]
New feature?	[x]
New sample?	[ ]
Related issues?
Related pull request	#351

What's in this Pull Request?

A GridLayout control to simplify rendering web parts with the standard grid layout. Intended to be really easy to use and handles reflowing content and compact layout.

[hugoabernier]

Sorry, I just realized that I created my branch from the master branch instead of dev. I'll do better next time :-)

[codecov-io]

Codecov Report

Merging #350 into dev will increase coverage by 0.43%.
The diff coverage is 82.85%.

@@            Coverage Diff             @@
##              dev     #350      +/-   ##
==========================================
+ Coverage   72.88%   73.31%   +0.43%     
==========================================
  Files          17       18       +1     
  Lines         767      802      +35     
  Branches      149      154       +5     
==========================================
+ Hits          559      588      +29     
- Misses        161      164       +3     
- Partials       47       50       +3

Impacted Files	Coverage Δ
src/controls/gridLayout/GridLayout.tsx	82.85% <82.85%> (ø)

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[hugoabernier]

@estruyf I'm planning on adding components for the other standard web part layouts (e.g.: filmstrip, compact, etc.) as per the SharePoint Design layout patterns.

I'm planning on submitting each one as a separate PR. Would you prefer them as a single PR?

[estruyf]

Thank you @hugoabernier, merged it to the DEV branch.

[estruyf]

Something seems wrong with the Github merging. I manually merged it, code should be fine, but Github doesn't know the source location it seems.

[hugoabernier]

@estruyf I can resubmit as a single 'layout' control instead of individual 'grid', 'filmstrip', 'compact', 'carousel' layouts.

[estruyf]

This grid control has already been merged so all good here.