Identifier is now a simple counting up number

Replaces `+new Date()`.
It is safer for the case if instances are initialized at the same time.
Merge pull request #89 from andreruffert/simplifies-instance-identifier

Identifier is now a simple counting up number
chore(grunt): introduce `grunt release` task

A task to simplify the release process:
* version bump
* codename generation
* build
* commit
chore(release): v0.3.4
Merge pull request #94 from andreruffert/release-0.3.4

chore(release): v0.3.4