Support for Chrome apps

It seems that there are some issues that needs to be solved in order to make eventpouch run in Chrome apps. The ones that I could identify so far are:

Apparently onbeforeunload is not allowed in Chrome apps. We might be able to use chrome.runtime.onSuspend instead.
eval is also forbidden in Chrome apps and MapReduce plugin for PouchDB makes use of it. We might be able to use pouchdb.mapreduce.noeval as an alternative.
Right now, the app version information is taken only for Firefox OS apps. It seems that we will also be able to get the app version for Chrome apps via chrome.runtime.getManifest().

arcturus / eventpouch

Support for Chrome apps #3