DSL: remove support `install` stanza

now replaced by `pkg`
Merge pull request #7276 from sempr/master

Upgrade LiteIDE.app to v24.2
Update Facebook iOS SDK to 3.20
Merge pull request #7268 from rolandwalker/remove_install_stanza

DSL: remove support for `install` stanza
Merge pull request #7279 from dlackty/facebook-io-sdk-320

Update Facebook iOS SDK to 3.20
Merge pull request #1 from caskroom/master

Merge From Original