Merge pull request Hackplayers#26 from Hackplayers/dev

Dev to master v2.3

Merge pull request Hackplayers#25 from Hackplayers/dev

Dev to master v2.2

Merge pull request Hackplayers#20 from Hackplayers/dev

Dev to master v2.1

Fix error in docker command on README

Merge pull request Hackplayers#13 from Hackplayers/dev

Dev to master v1.9

Merge pull request Hackplayers#11 from Hackplayers/dev

Dev to master v1.8

Merge pull request Hackplayers#6 from Hackplayers/dev

Dev to master v1.7

Merge pull request Hackplayers#4 from Hackplayers/dev

Dev to master v1.6

Merge pull request Hackplayers#1 from Hackplayers/dev

Dev to master v1.5

Modified ruby gem badge. Better explanation about ruby gem use on REA…

…DME. Version changed to v1.4