Improvements to Lawrencium paths: - `parse_lawrencium_path` only optionally converts paths to absolute or relative   paths. - Added ability to get a relative path from a repo object. - `GetLawrenciumPath` converts path to repo-relative by default, but that can be   overridden.
Improvements to Lawrencium paths:
- `parse_lawrencium_path` only optionally converts paths to absolute or relative
  paths.
- Added ability to get a relative path from a repo object.
- `GetLawrenciumPath` converts path to repo-relative by default, but that can be
  overridden.

Improvements to `Hglog`:
- Added `Hgrepolog` command.
- Fixed clean-up problems.

Miscellaneous:
- Removed auto-completion from `Hgdiff` and `Hgdiffsum` command families since
  the only allowed parameters are revision numbers/hashes/specs.
- Code clean-up for `Hgdiff`.

ludovicchabant/vim-lawrencium