Fixed incorrect channel names.
Fixed a syntax error.
Added the channels() method to the ChannelBrothers registry.
Added the channels() method to GanderImage::ChannelFormat.
Added the RunTimeChannelFormat class and test cases for it.
Fixed RunTimeChannelFormat::pointerIndex() and added test cases for it.
Added the pointerOffset methods to provide the same interface as the ChannelFormat.
Added the numberOfChannels() method to the ChannelFormat classes.
Enabled boost asserts.
Added the numberOfChannelPointers() method to the ChannelFormat classes.
Added a [] operator to the FlagSet class to allow indexed elements to be
accessed.
Changed the name of ChannelFormatMask::offset to
ChannelFormatMask::pointerOffset.
Added the PixelAccessor classes. These classes form the base for all
accessors that access image data.
Added the MaskChannels wrapper class and tests.