addition of files for beginning history template
Restructing/reorganizing a tree for the history template. This includes an example refactoring of chapter titles from precalc -> psychology -> history showing how to use skeletons/slots in a multi-file cascade/inheritance.
Cleaning up unnecessary lines in history.less
splitting of ending book elements into #chapter-end and #book-end namespacing
intitial tests of history slot usage
creation of eoc slots for history along with creating necessary skeleton for psychology
skeleton/slots work for history eoc headers and header sections
Moved .title mixins to a #title namespace
added skeleton and slots for end of book solutions and references. Added to psychology.
Merging Stacey's end-of-* changes into my .title/#title changes
creation of skeleton/slot for end of book references section and index + initial styling
Key Terms title namespace adustment, index/index term additions
refactor and removal of EOC section from psychology.less. Necessary delta/additions added to psychology-skeleton and psychology-slots.
conversion of precalculus end-of-chapter, end-of-book, and index sections to skeleton and slots
fixes for Index heading, References margin headings
Changed our approach to parametric mixins in order to handle arbitrarily deep nested elements. The slots now match our documentation from our in-person meeting in January.
Merged conflicts, added Staceys eoc/eob/index changes
initiator file for use with dropdown code for plone/naginata, etc.
refactoring of end-of-book-solutions for broom up in psychology-skeleton.  Refactoring of psychology and precalculus skeleton to use new parametric mixin. Creation of code to fix legacy inline answer key issue
conversion of index section to skeleton/slots in precalculus, psychology and history. Styling of history titles for Answer Key and References for new #title namespace.