Updated some paths on the e2e tests
Added a private SauceLabs config file for testing purpouses
FEATURE: Added the possibility to run the e2e tests on a saucelabs account.

How to use:

Create a credentials file "saucelabs.json" located inside the Gruntfile.js file.
A file "saucelabs.json.sample" is provided with the 3 basic params.

Once the file is completed with valid SauceLabs credentials, we can run our e2e tests on two modalities:

1. Local:
$ grunt test:e2e

2. On SauceLabs servers:
$ grunt protractor:saucelabs
BUG: Made the "saucelabs.config" file optional on the grunt execution
feat(build): Manage the Changelog with "grunt-conventional-changelog":

https://github.com/vojtajina/grunt-conventional-changelog
Updated some config files
feat(build): Added grunt-bump to the project: https://github.com/vojtajina/grunt-bump
Merge branch 'master' of https://github.com/elesdoar/angular-leaflet-directive into elesdoar-master

Conflicts:
	.gitignore
Merge branch 'master' of https://github.com/tombatossals/angular-leaflet-directive
Solved a bug on package.json
fix(build): Updated dependencies versions on package.json file
Updated to the correct actual development version
Updated grunt-bump configuration
Updated version on package.json
Release v0.6.2
feat(Documentation): More detailed documentation of how to contribute to the project.
fix(build): Removed the center undefined log message as noted by @ngoldman here: https://github.com/tombatossals/angular-leaflet-directive/issues/206
New version of the library
Added more unitary tests
Updated bower name and dependencies