Adding minimal perfect hash function generation.

An implementation of minimal perfect hash function generation as described in
Czech et. al. 1992.  http://bit.ly/137iukS
[Sims] bump sha1
Merge pull request #353 from tshort/devel

[Sims] bump sha1
bump Color
bump PyCall
bump PyPlot
bump TimeSeries sha1
bump TimeSeries sha1 - debugging fixed requirements error
bump IJulia
Bump AWS SHA1
Patch HDF5 (DataFrames, gc)
Bump GLPK to 0.2.5
bump PyCall
Pkg2 -> Pkg in tests

(also fix indentation)
Patch HDF5 (@save and @load, performance improvements)
Bump Clang
bump Blocks.jl sha1:
added @prepare for chaining pre-processing methods
Bump Compose
[Sundials] Change metadata to point to JuliaLang/Sundials.jl
Merge branch 'devel' of git://github.com/JuliaLang/METADATA.jl into devel