add release script #3363

#3363

Usage:

```bash
git clone https://github.com/openscholar/openscholar.git
cd openscholar
git checkout SCHOLAR-3.7
./scripts/release.sh
```

The script:
 - detects the version from `openscholar.info` (i.e. 3.6)
 - finds the most recent tag matching that version (i.e. SCHOLAR-3.6.2)
 - checks out that tag and runs build
 - moves the openscholar profile into the docroot and zips the result