Bumped to v0.1.5

Added Travis button/indicator and lowered require to Julia 0.3
prerelease’s
Merge pull request #1 from JuliaLang/metadata-v2

Catchup
move url of RegERMs to JuliaStats
Register ManifoldLearning: v0.1.0
Merge pull request #1152 from wildart/pull-request/1db81427

Register ManifoldLearning: v0.1.0
Tag HDF5 v0.2.26
Merge pull request #1154 from timholy/pull-request/2c75abd2

Tag HDF5 v0.2.26
Tag Optim v0.3.1
Tag Clustering v0.2.7
Register RDF
Tag RDF v0.0.1
Tag Lint v0.0.18
Merge pull request #1156 from tonyhffong/metadata-v2

Lint bugfix
Tag MathProgBase v0.2.3
Merge branch 'metadata-v2' of git://github.com/JuliaLang/METADATA.jl into metadata-v2
Merge pull request #1157 from joehuchette/pull-request/59c38bef

Bump MathProgBase v0.2.3
Tag Compose v0.3.4
Tag Gadfly v0.3.4
Merge pull request #1158 from dcjones/pull-request/d80a7cba

Tag Compose v0.3.4 and Gadfly v0.3.4
Tag MathProgBase v0.2.4