Merge pull request #1 from longtimeago/1

Playing with branch
Update README.md
Merge pull request #2 from longtimeago/2

2
Update README.md
Improved card blocking concurrency
Update README.md
Update README.md
One more fix
Merge pull request #3 from longtimeago/3

Improved card blocking concurrency
Merge remote-tracking branch 'origin/master' into 2

Conflicts:
	src/main/java/com/ppol/atm/service/impl/CardBlockServiceImpl.java