Add missing shebang to scripts/install.sh (#85)
Add missing shebang to scripts/install.sh (#85)

Fix the error when executing in some none-bash shell(eg. fish):

```
  Failed to execute process './scripts/install.sh'. Reason:
  exec: Exec format error
  The file './scripts/install.sh' is marked as an executable
    but could not be run by the operating system.
```
zeit/hyper,spncrgr/hyper,ekmartin/hyperterm,chabou/hyper,KunalKene1797/hyper,zeit/hyperterm,rickycodes/hyper,reslaurentii/hyper,martinvd/hyper,spncrgr/hyper,ppot/hyper,AlmirKadric/hyperterm,mike-engel/hyperterm,AlmirKadric/hyperterm,ppot/hyper,whitelynx/hyperterm,zeit/hyperterm,whitelynx/hyperterm,MartyGentillon/hyper,stefanivic/hyper,MartyGentillon/hyper,mike-engel/hyperterm,derrickpelletier/hyper,bekher/hyperterm,KunalKene1797/hyper,chabou/hyper,chabou/hyper,zeit/hyper,rickycodes/hyper,derrickpelletier/hyper,stefanivic/hyper,reslaurentii/hyper,ekmartin/hyperterm,wilsontayar/hyper,wilsontayar/hyper,martinvd/hyper,zeit/hyper,zeit/hyper,ppot/hyper,bekher/hyperterm