Update solution filter function.
docs: Update MathJax path.
Merge pull request #68 from gsmcmullin/update_mathjax

Update MathJax path for Doxygen.
Merge pull request #69 from cbeighley/update_solution_filter

Update solution filter function
Added a print for sdiffs
Minor formatting and docs
Merge pull request #77 from imh/print_sdiff

Added a print for sdiffs
added safe clamped subtraction macro
removed unnecessary functions, rewrote comments, other organization
must perfect alignment...
consolidated measure_b function
consolidated the last one
refactored set_nkf, replaced some calls to CLAMP_DIFF with assertions
entry/exit debug macro