Vcspull

- [cli] Update documentation when no config found to show `yaml` and
`json`. Remove mentioning of `conf`.

- [logging] [6] - fix issue where log templates would not
concatenate correctly.

[6]: https://github.com/vcs-python/vcspull/issues/6

- [packaging] Fix issue where `package_metadata.py` missing from
`MANIFEST.in`.

- [setup.py] remove history from readme

- [cli]: fix message when adding remotes
- [internals]: split config-related functions into `config` module.
- [tests]: consolidate tests from `testsuite.cli` into
`testsuite.config`.
- [tests]: remove stub TestSuites insite of `cli` tests.
- [tests]: Refactor helpers. Tests should now run much faster.
- [cli]: vcspull now checks for configs in `~/.vcspull` (yaml and json
files) as well as the standard `~/.vcspull.{yaml,json}` files.

- [dev]: support for tmuxp `before_script` to set up local virtualenv +
dependencies.
- [dev]: Clean up `__init__.py` imports
- [internals]: move :meth:`update` to :meth:`update_dict` in `utils`.
- [cli]: `-d` / `--dirmatch` for matching directories, accepts
[fnmatch]'s.
- [cli]: `-r` / `--repomatch` for matching directories, accepts
[fnmatch]'s.
- [cli]: `-c` / `--config` YAML / JSON file of repositories
- [config/vcs]: Exception for private / ssh GitHub repository URLs and
message to change to correct format.
- [docs]: Update docs to reflect updates on new commands and how to clone
private / privileged GitHub repos.