How does Slicer start up, and what are all these script files for?

The README.scripts file in the slicer2/Scripts directory describes the purpose and usage of each script. Here are excerpts from that file:

• slicer2/launch.tcl: Called from slicer2-[osname]. Bootstraps the slicer.
• slicer2/Scripts/cmaker.tcl: Builds Slicer.
• slicer2/Scripts/genlib.tcl: Builds Slicer's support libraries.
• slicer2/Scripts/tarup.tcl: Archives Slicer for binary distribution.
• slicer2/Scripts/comment: Comments Tcl files.
• slicer2/Scripts/document.tcl: Creates the Slicer website. Requires doxygen to build the C++ documentation.
• slicer2/Scripts/mrmlize: Creates a MRML (Medical Reality Modeling Language) file for a volume.
• slicer2/Scripts/printmrml: Prints a MRML file.