Merge pull request #4 from jmcollin78/master

Add the getKeys function
Bump version
Merge pull request #5 from jmcollin78/master

Add the addFile and reset function to be able to manage file one by one
Update README
Bump version
Merge branch 'master' of https://github.com/jmcollin78/java-properties into jmcollin78-master

Conflicts:
	README.md
Merge branch 'jmcollin78-master'
Bump version
Merge branch 'master' of https://github.com/jmcollin78/java-properties

Conflicts:
	package.json
Merge pull request #8 from jmcollin78/master

Adds default value and getInt and getFloat method.
Fix jshint error