Max troop lvl / doc fix

[doluk]

including the doc fixing part from #136
Also I added the DataContainer.village attribute as it can be initialized already with the loaded data from json.

This pull requests contains the fix for #143.
It now returns

### Wall Wrecker
TH: LVL
11: None
12: 03
13: 04
14: 04
15: 04

### Battle Blimp
TH: LVL
11: None
12: 03
13: 04
14: 04
15: 04

### Stone Slammer
TH: LVL
11: None
12: 03
13: 04
14: 04
15: 04

### Siege Barracks
TH: LVL
12: None
13: 04
14: 04
15: 04

### Log Launcher
TH: LVL
12: None
13: 04
14: 04
15: 04

### Flame Flinger
TH: LVL
13: None
14: 04
15: 04

### Battle Drill
TH: LVL
14: None
15: 04

which should be correct!