added typical .gitignore for IntelliJ/Eclipse users
added alternative repository based on Redis key-value store
using Jedis for storing tokens in Redis DB
attempt to work with redisson
using Jedis for Redis access
code formatting
updated infos
Update README.md
fixed test method name
removed unnecessary comments
fixed error message expectation
Merge pull request #1 from bkimminich/master

Adopted example to be multi-node ready by using Redis for tokens instead of plain Map