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File fc-solve/docs/fc-solve-support-for-delta-states-planning.txt

+This document will describe how we are planning to add support for delta
+states (current "delta_states.c" in the Freecell Solver distribution) to
+the main libfreecell-solver library, and how it will be implemented.
+Encoded states will be stored instead of the currently decoded states in:
+1. The states collection (the hash or tree used to store all traversed or
+encountered states) - handled by check_and_add_state.c
+2. In the Random-DFS stack, the Breadth-First-Search queue, and the 
+Best-First-Search priority queue.
+The data type of a possibly encoded state will be fcs_stored_state_t which
+will be an encoded state for FCS_DELTA_STATES and an unencoded state if
+We will define two macros/inline-functions: