update items.csv to minecraft 1.5

dont pull till 1.5 bukkit devbuild
add 1.5 new slab blocks
add armor aliases since new leather names
[fix] trying to AFK others should work now
Merge pull request #383 from necrodoom/patch-73

[fix] trying to AFK others should work now
Merge pull request #342 from necrodoom/patch-60

[feature] update items.csv to minecraft 1.5
Initial 1.5 update