is browser supported?

Nobody has claimed this yet.

Hi, I just tried to build a browser app with the following code and I have an issue concerning `blake2b-wasm` wich uses node `fs` module.

```
var hyperdb = require('hyperdb')
var ram = require('random-access-memory')
var db = hyperdb(function (filename) {
return ram()
})

db.put('/hello', 'world', function (err) {
if (err) throw err
db.get('/hello', function (err, nodes) {
if (err) throw err
console.log('/hello --> ' + nodes[0].value)
})
})
```

Is hyperdb working on browser?

The issue names no repository files or tests. Reproduce the shown hyperdb and random-access-memory example in a browser build, then trace blake2b-wasm's Node fs dependency; done means confirming browser support and documenting the limitation or supported path.

Written by the indexing model from the issue text.