support addArray on transactionAssociationSet
support removeArray with transactionAssociationSet
put docs in subfolders
update docs readme
add how-to for reading docs
put validators in right folder
document Association and AssociationCurator
document singular associations
document plural associations
document association proxies
document association sets
Merge pull request #1111 from batmanjs/transaction-addArray

support addArray / removeArray on transactionAssociationSet
Better missing controller error message (fixes #613)
Merge pull request #1113 from batmanjs/no-controller-message

Better missing controller error message (fixes #613)
Merge branch 'master' into assoc-docs
Merge pull request #1105 from batmanjs/assoc-docs

Association documentation
DRY up associations
Move ::find to Batman.Enumerable and use it in PluralAssociation
use provideDefaults for association options
remove fallback to Batman.currentApp since its a default option