Update 1.0.12-download.md

Update 1.0.12-download.md

Update 1.0.12-download.md

Update 1.0.12-download.md

Merge pull request dotnet#1757 from leecow/master

Remove platforms.md and initial drop of updated releases.json

Merge pull request dotnet#1609 from dotnet/21ApiDiff

Api diff between 2.0 and 2.1

Merge pull request dotnet#1550 from leecow/master

fix blob url in releases.csv - remove space

2.1-rc1 API diff between preview2 and rc1

Merge pull request dotnet#1460 from leecow/master

correct affected package list

Merge pull request dotnet#1460 from leecow/master

correct affected package list