Adding a file to explain the "toggle" variable in dynamicRefineDict
Changes to hexRef4, to read the value of toggle from a dictionary
file, rather than having to recompile if the default is wrong.
If no value is specified in the dictionary, the default "0" is used.
Updated README to reflect changes to hexRef4.C
Merge branch 'master' of https://github.com/chrisb2244/2D-AMR-OFlib