Remember last chosen TablePickerView

The ELCAlbumPickerTapController can remember which ELCAssetTablePicker
is the one which we choose the image from last time and use it as the
default Picker
Change the way of saving selected images

1.Change the way of saving selected images, so the selected images can
be recorded when the picker opened the next time.

2. change the View to be 3*3
clear warning for duplicated images

clear warning for duplicated images
ELCAssetTable will scroll to the selected asset

When selected image from ImageInspectionViewCtrl, the original
ELCAssetTable will scroll to the picture choose by you after chosen
finished
Can set maximum select count

Can set the maximum images that can be choose in one time
Change Controller Structure

Change the whole structure of ViewControllers and Delegates. Remove the
ELCConsole Singleton that is used to keep the selectedAssets data
before. Add PickerSwitchController to combine the functionality
together.
Remove unused Classes and files

Simplify the logic between controllers and remove those unused classes,
protocals, and files. this version only support images.