Lakshmi

Added
- Added pre-commit to the project.
- Support for calling user defined function on cache misses in `lakshmi.cache`.
- Progress bar for slow commands.
- `lak list lots` command.
Changed
- `lakshmi.lak` module moved from `lakshmi/lak` to `lakshmi/` directory.
- Optimized code to prevent unnecessary calls to slow functions.
Fixed
- Broken link to `lak.md` from `README.md`.
- User-agent is now set correctly.
- `lak list` warnings for what-ifs are now printed consistently.
- Documentation.

Added
- Detailed documentation for `lak` command: `docs/lak.md`.
- Integration test for `lak` command.
Changed
- `lak whatif` and `lak info` command now require a asset or account as a sub-command.
- All function names changed to snake case + PEP8 style formatting.
- Visibility of some members in classes changed to private.
- Short option for --asset-class in `lak list aa` changed from -a to -c (This reduces confusion, -a is used in other commands for specifying asset)
Fixed
- Language and documentation for `lak` command-line help messages.
- Relax the dependencies to any non-major release of those packages.
- Typos and language in `README.md`.
- Some tests were not running due to duplicate names.

Fixed
- Moved `data/` files inside lakshmi to include it in wheel package.

Fixed
- Added `MANIFEST.in` file to include `data/` files in the release package.

Fixed
- lak add asset command wasn't working due to a typo. Fixed.

Fixed
- `lak init` command no longer asks user to run lak init first!