Added license and README.md

LICENSE

+> "THE BEER-WARE LICENSE":
+> Alberto Ramos wrote this file. As long as you retain this 
+> notice you can do whatever you want with this stuff. If we meet some 
+> day, and you think this stuff is worth it, you can buy me a beer in 
+> return. <alberto.ramos@cern.ch>

README.md

+
+# BDIO.jl
+
+BDIO.jl is a package to write/read [BDIO](http://bdio.org) (**B**inary
+**D**ata **I**nput/**O**utput) files. 
+
+The test1.jl file in the `tests` directory gives a simple example on
+the usage of the package
+```julia
+julia> BDIO_set_user("alberto")
+julia> BDIO_set_host("laptop")
+julia> fb  = BDIO_open("foo.bdio", "w", "Test file")
+
+julia> BDIO_start_record!(fb, BDIO_BIN_INT64LE, 1, true)
+julia> BDIO_write!(fb, collect(1:1000))
+julia> BDIO_write_hash!(fb)
+
+julia> BDIO_start_record!(fb, BDIO_BIN_F64LE, 2, true)
+julia> vec1  = randn(1000)
+
+julia> vec2  = similar(vec1)
+julia> vec2 .= .- vec1
+
+julia> BDIO_write!(fb, vec1)
+julia> BDIO_write!(fb, vec2)
+julia> BDIO_write_hash!(fb)
+
+julia> BDIO_close!(fb)
+
+julia> fb2 = BDIO_open("foo.bdio", "r")
+
+julia> global isum = 0
+julia> global fsum = 0.0
+
+julia> while BDIO_seek!(fb2)
+julia>     if BDIO_get_uinfo(fb2) == 1
+julia>         idt = similar(Array{Int64,   1}, 100)
+julia>         for i = 1:10
+julia>             BDIO_read(fb2, idt)
+julia>             global isum += sum(idt)
+julia>         end
+julia>     elseif BDIO_get_uinfo(fb2) == 2
+julia>         fdt = similar(Array{Float64, 1}, 100)
+julia>         for i = 1:20
+julia>             BDIO_read(fb2, fdt)
+julia>             global fsum += sum(fdt)
+julia>         end
+julia>     end
+julia> end
+
+julia> rm("foo.bdio", force=true)
+julia> ( (abs(fsum) < 1.0E-10) && ((2*isum - 1000*(1001)) == 0) )
+```