Merge pull request #1503 from davidavdav/metadata-v2

Metadata v2
Tag Lint v0.1.28
Merge pull request #1553 from tonyhffong/metadata-v2

Tag Lint v0.1.28
Tag Lint v0.1.29
Merge pull request #1554 from tonyhffong/metadata-v2

Tag Lint v0.1.29
Register NIDAQ
Merge branch 'metadata-v2' of git://github.com/JuliaLang/METADATA.jl into metadata-v2
Tag NIDAQ v0.0.1
Merge pull request #1555 from bjarthur/metadata-v2

NIDAQ.jl register/publish
tag ICU v0.4.4
Tag Images v0.4.17
Merge pull request #1556 from timholy/pull-request/693f5c34

Tag Images v0.4.17
Tag Grid v0.3.4
Tag Color v0.3.9
Merge pull request #1557 from timholy/pull-request/a7db08f5

Tag Color v0.3.9
Tag TestImages v0.0.6
Tag Images v0.4.18
Tag Cairo v0.2.19
Tag Sundials v0.1.1
Merge branch 'metadata-v2' of git://github.com/JuliaLang/METADATA.jl into metadata-v2