WIP: Add source builds for HDF5 on Linux

Hi, 

I don't have root access so I added support to build HDF5 from sources.   I tried the above but it failed.  Then I went into the src/ directory and ran `./configure --prefix=/path/to/.julia/v0.3/HDF5/deps/usr` and `make install`.  Then it works from Julia.  So I don't understand how to use the build system well enough to figure out this trivial error.  Hopefully someone knows and we can get HDF5 working when a user doesn't have root access.

Glen