Use templated buildpack.toml instead of buildpack.toml.tmpl

- Libcfbuildpack Packager can now accept a version flag to package with a templated version
[#167052988]

Co-authored-by: David Freilich <dfreilich@pivotal.io>

Author: kardolus

.gitignore

@@ -4,4 +4,3 @@
 python-cnb_*
 python-cnb.tgz
 /bin
-/buildpack.toml