Added Dockerfile

[mattions]

Dockerizing the application.

[PoisonAlien]

Hi, I was about to ask you. Im sorry, I have very little knowledge about docker. So this will be the docker file ? I'm still trying to understand how docker containers work.

[mattions]

Hi there! Docker uses virtual container to wrap an application with all the needed dependences.

so for Example you could do

docker run -it sevenbridges/maftools:dockerizeit R

which will pull a Docker Image with maftools installed and drop you into an R console.

    mattions@apollo:~$ docker run -it sevenbridges/maftools:dockerizeit R

    R version 3.2.3 (2015-12-10) -- "Wooden Christmas-Tree"
    Copyright (C) 2015 The R Foundation for Statistical Computing
    Platform: x86_64-pc-linux-gnu (64-bit)

    R is free software and comes with ABSOLUTELY NO WARRANTY.
    You are welcome to redistribute it under certain conditions.
    Type 'license()' or 'licence()' for distribution details.

    R is a collaborative project with many contributors.
    Type 'contributors()' for more information and
    'citation()' on how to cite R or R packages in publications.

    Type 'demo()' for some demos, 'help()' for on-line help, or
    'help.start()' for an HTML browser interface to help.
    Type 'q()' to quit R.

    > library("maftools")
    Warning messages:
    1: replacing previous import by 'grid::arrow' when loading 'maftools' 
    2: replacing previous import by 'grid::unit' when loading 'maftools' 
    3: replacing previous import by 'ggplot2::unit' when loading 'NMF' 
    4: replacing previous import by 'ggplot2::arrow' when loading 'NMF' 
    > 

BTW, I'm not super expert in installing R script, but does this line: https://github.com/PoisonAlien/maftools/pull/6/files#diff-3254677a7917c6c01f55212f86c57fbfR19 makes sense to build and install the package locally?