bats directory persists after idol --package

[brent-is-still-here]

The bats directory and .git directory exist in packaged instances of Idol.

idol_package.sh currently uses
tar --exclude="${BASE_DIR}/bats" --exclude="${BASE_DIR}/.git" -cvzf "${OUTPUT_DIR}/idol.tar.gz" -C $(dirname "${BASE_DIR}") idol;
to attempt to prevent this.

The result of this issue is that, when unpackaging an instance of Idol on a system to be tested, the user needs to run:

1. # rm -rf ${INSTALL_DIRECTORY}/idol/bats
2. # rm -rf ${INSTALL_DIRECTORY}/idol/.git >> This command isn't a requirement, but keeps things clean.