chore: bump version to `0.1.4` (#60)

To make new release with recent PR changes.

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Co-authored-by: Yu Xie <xieyu.fish@outlook.com>

typo

chore: automated `hpacker` install (#45)

The first time the `bioemu.sidechains_relax` module is invoked, it will
attempt to install `hpacker` and its dependencies into a separate
`hpacker` conda environment. The specific environment name can also be
controlled via the `HPACKER_ENVNAME` environment variable.

Fixes #42 

TODOs:
- [X] Test local wheels before re-uploading package / making new release
- [X] Fix tests

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Co-authored-by: Tim Hempel <thempel@zedat.fu-berlin.de>

fix typo in README