Fix reading datasets made of compound datatypes with arrays
Add test of reading dataset with compound datatype
implement Blosc compression for #173
no need to check for HDF5 1.8 in blosc.jl, since that is required by HDF5.jl anyway
add heuristic auto-chunking if chunk is not specified for blosc; add compress=true option to JLD
Pkg.add Blosc in travis
added tests for Blosc-compressed JLD
Fix path issues for loading test file
address comments by @timholy
add documentation of new compression options; change `"compress"` default to `"blosc"` in the HDF5 interface to correspond to `compress=true` in JLD
Merge pull request #174 from stevengj/blosc

implement Blosc compression
Replace Uint->UInt in typenames (backwards compatibility for old files)

Fixes https://github.com/timholy/JLDArchives.jl/issues/4
See https://github.com/JuliaLang/julia/pull/8907
add -F before -e to fix error when building Blosc

error is: could not spawn `echo 1.5.0`: no such file or directory (ENOENT)

echo.exe is in the Git/bin directory under the Julia install, which gets added to the path by juliarc.jl
so need to include juliarc.jl before evaluating Pkg.build
Fix #176
Fix for JuliaLang/julia#8501
add support for the Nix package manager
that should have been spaces ;-)