Fixing bad links

Stripping README, improving docs site

This commit moves all project documentation from the README to the docs
site. This will hopefully be more user-friendly and prevent the README
documentation from getting stale.

This commit also adds a media page with the Spark-Bench presentation, a
guide for contributing to Spark-Bench, improvements to the Quickstart
guide, addition of an Installation guide, and a guide for using SBT in
the context of the project.

Adding issue template for Github Issues

Adding issue template for Github Issues

Add realpath function

Variety of fixes to README

- Fix references to ecurtin/spark-bench
- More info on setting environment variables
- updating instructions for examples

Updating custom workload docs

The old document referenced an old API. This rewrite focuses on the
example from ecurtin/spark-bench-custom-workload.

Adds spark-submit-parallel to docs

Updates to examples and documents

Adds the csv-vs-parquet config file to examples and docs
Adds page for workload-suite documentation
Adds pages for examples

Passing config string instead of temp file

When launching spark-bench through assembled spark-submit scripts, the
child argument used to be a path to a temporary file created by the
launch process. This was causing issues when running in cluster mode
because the temporary files were in local storage.

Now instead the configuration is passed as one long string instead of a
path to a temporary file.