preliminary support for reading Mu Law encoded files...

needs cleanup and testing.
Fix an off-by-one indexing error in Mu-Law decompression
add a function to decompression A-law encoded files.
Use a single function to decompress A-law and Mu-law
The options package is not needed.

The functionality is provided by Julia keyword arguments now.
The keyword arguments must be explicitly set.
replace usage of memio with IOBuffer.
List julia 0.2 as a requirement.
named arguments should be named

The main function 

function wavwrite(samples::Array, io::IO; Fs=8000, nbits=16, compression=WAVE_FORMAT_PCM)

is called in 

function wavwrite(samples::Array, filename::String; Fs=8000, nbits=16, compression=WAVE_FORMAT_PCM)

as if parameters Fs etc are positional, and not named
Merge pull request #5 from davidavdav/patch-1

named arguments should be named
Address min/max deprecation warnings.

Replace with minimum and maximum.
Follow Julia conventions, move test.jl to runtests.jl
Add a license (MIT) to the package.
Add content to the README file.

I threw the function documentation in here for now. I need to investigate integrating
this with the Julia help system.
flush the IO stream in wavwrite when a filename is given.

Otherwise, the file is not written to disk until the garbage collector runs.
Update the readme description of the example.
Convert the RST tables in README.md to github markdown tables.
Formatting of Julia code
Merge pull request #9 from davidavdav/patch-2

Formatting of Julia code
Make reading a subrange of the file more efficient.

This fixes #8. As a result of this change, only the requested samples are read when loading a subrange of the WAV file. Prior to this change, the entire file was read into memory before returning a subrange to the user.