TODO list for implementing a new keyword
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Not necessarily in this order:

Create and edit files xxxx.h and xxxx.cc (a good not-too-basic template is EIGE)
Add xxxx.h to list of header files in include/keywords.h
Add xxxx.cc to list of files in SConscript
Add new xxxx base class to io/Input*.h (run-jobs in which keywords are needed)
Add calls to xxxx::unparse() and xxxx::analyse() in io/Input*.cc (run-jobs in which keywords are needed)
Add new base class to relevant Input* classes in boost_python/Inputs_bpl.cpp
Add new base class to boost/keywords.cpp so that keywords are ready for python gui
Add any defaults used (DEF_xxxx_zzzz) to the "defaults" file in the phaser main directory
Add the python parameters (created in "defaults") to phaser/python_interface/phenix_interface for phenix gui
Add the new keywords to the ccp4i gui ccp4i/*/* files
Add new files to svn (svn add xxxx.cc xxxx.h) before commit
Add keywords to wiki (keywords and python interface)

TODO list for implementing a new sub-keyword
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Not necessarily in this order:

Edit files xxxx.h and xxxx.cc
Add new base class to boost/keywords.cpp so that keywords are ready for python gui
Add any defaults used (DEF_xxxx_zzzz) to the "defaults" file in the phaser main directory
Add the python parameters (created in "defaults") to phaser/python_interface/phenix_interface for phenix gui
Add the new keywords to the ccp4i gui ccp4i/*/* files
Add keywords to wiki (keywords and python interface)