Merge pull request #739 from tanmaykm/metadata-v2

Tag ProtoBuf v0.0.3
Tag Zlib v0.1.6
Merge pull request #740 from dcjones/pull-request/5c6734c5

Tag Zlib v0.1.6
Tag DataArrays v0.1.6
Tag Jewel v0.4.1
Tag Grid v0.2.11
Merge pull request #741 from timholy/pull-request/85997cc0

Tag Grid v0.2.11
Tag Grid v0.2.12
Merge pull request #742 from timholy/pull-request/76c4ed74

Tag Grid v0.2.12
Tag TOML v0.1.2
Tag TestImages v0.0.3
Tag Roots v0.1.2
Merge pull request #744 from jverzani/pull-request/2cbd0e76

Tag Roots v0.1.2
Tag NumericExtensions v0.6.1
Tag GLM v0.3.2
Tag MAT v0.2.4
Tag PDMats v0.1.2
Tag NumericFuns v0.2.2
Tag StatsBase v0.3.10
Tag StatsBase v0.3.11