RTable: observer, spinner, async
RTable: refactor observer classes
RTable: asynchronous unarchiving of table model
RTable: change project tree structure
RTable: comparison of weak references
RTable: update observer classes
RTable: change project tree of IDPKit
RTable: IDPModel
RTable: MainViewController adopts IDPModelObserver
RTable: RTCellModel inherit IDPModel
RTable: spacer image and custom table cell nib
RTable: cell view observes cell model
RTable: fix several stupid errors
RTable: remove observer
RTable: image model
RTable: synchronize image cache

Load image without caching
RTable: move image related files to separate folder
RTable: refactoring
RTable: async image view and stuff
RTable: custom property for cell label and fixes