Update build_hardware.md

fix Hyperlink error

Update index.md

fix typo

Fixed conda install path

Update install_software.md

Update install_software.md

The conda install path was pointing to `envs/mac.yml`, but nowhere before that instruction does it tell the reader to `cd` into the `install` subdirectory first, so for the command to work, `install` must be prepended to the path.

Dev 2.5.0

Added screwless  camera design to documentation

Fix links in badges to point to wroscoe:dev

Handling code quality and dependency upgrades

- Use conda as build environment
- Add test dependencies to extras_require
- Add code coverage (coverage and codecov.io)
- Update badges in README