adds minimum level requirement for items
Adds diagram layer-architecture
Merge pull request #170 from paddatrapper/level-items

Adds minimum level requirement for items
Adds diagram layer-architecture
Merge branch 'master' of https://github.com/verhagen/JAdventure
Architecture
Merge pull request #171 from verhagen/master

Adds architecture layers
Corrects link to git repo Progether
Update architecture.md
Corrects link to git repo Progether
Merge branch 'master' of https://github.com/verhagen/JAdventure.git
Merge pull request #172 from verhagen/master

Corrects link to git repo Progether