First release of cg-export-db as plugin

[jcscottiii]

User details:

• Adds instructions on how to move your data in 4 steps in the README

Technical details:

• Introducing the use of a plugin to handle the migration.
• Embeds the Python export.py into the plugin so that we can change the targeted services on the fly and push it as a new app.
• Adds a new import.py program.
• Adds release.sh to be able to build the plugin for different systems.

Want to try:

Installation

• Windows 32Bit: cf.exe install-plugin https://github.com/jcscottiii/cg-export-db/releases/download/v0.0.1/windows-32-cg-export-db.exe
• Windows 64Bit: cf.exe install-plugin https://github.com/jcscottiii/cg-export-db/releases/download/v0.0.1/windows-64-cg-export-db.exe
• Mac OS X: cf install-plugin https://github.com/jcscottiii/cg-export-db/releases/download/v0.0.1/mac-cg-export-db
• Linux 32Bit: cf install-plugin https://github.com/jcscottiii/cg-export-db/releases/download/v0.0.1/linux-32-cg-export-db
• Linux 64Bit: `cf install-plugin https://github.com/jcscottiii/cg-export-db/releases/download/v0.0.1/linux-64-cg-export-db

This is not the real 0.0.1 release. Look below:

TODO

After this PR:

• Change the buildpack in the two manifests to the 18F one (after https://github.com/18F/cf-buildpack-db-export/pull/2)
• Re-run go-bindata
• Push up releases for 0.0.1 to the 18F/cg-export-db repo

[jezhumble]

THIS IS AMAZING