update dependencies

• added karma both jasmine-core as dependencies, as recommended for npm@3
• changed all dependencies from ~ (patch level) to ^ (minor level). It will change nothing for now, because minor level accepts only patchs for 0.x.x packages, and all current dependencies are 0.x.x
• updated all dependencies
  grunt-contrib-clean from ~0.5.0 to ^0.6.0
  grunt-contrib-jshint from ~0.10.0 to ^0.11.1
  grunt-jsbeautifier from ~0.2.7 to ^0.2.10
  grunt-karma from ~0.8.3 to ^0.10.1
  karma-browserstack-launcher from ~0.1.1 to ^0.1.2
  karma-coverage from ~0.2.4 to ^0.2.7
  karma-jasmine from ~0.2.2 to ^0.3.5

update README.md

Just an update to README.md, to reflect changes on npmjs.org

fix Attribute module

This patch fix a bug that makes setAttribute set incorrect values..

improve code coverage

Improving tests for maximum code coverage.
Drafting a release cause some minimum lines of source code changed.

initial character module

First steps in the character module (only get and set attribute).
Some tests for the attributes and character modules.

pre gulp migration

Just pinning when i started Gulp migration.

bower testing

Trying to push library to bower, testing ignoring of files.

initial release

Just some dependencies tests.
This release does not contains the top level library API.