Fixed minor bugs/typos, added 2014_jasa_mfp.m

In ddmfp.m -- edits for improved readability and clarity

In fddmfp.m -- edits for improved readability and clarity

In fmfp.m -- edits for improved readability and clarity

In mfp.m -- In fddmfp.m -- edits for improved readability and clarity.
Also re-structure to more strongly resemble other functions

In swa.m -- Fixed minor bug in which input signal normalizations were
not properly removed from dispersion curve information. The code was
also restructured some to better resemble upcoming JASA Express Letter
mathematics.

In sws.m -- superficial change (added a space)

In .mat files, fixed a minor bug that presented meta.s as a cell vector

In demo_2014_jasa.m -- Changed parameters to (1) match the new
demo_2014_jasa_mfp.m file and to (2) make the process less memory
intensive

Added demo_2014_jasa_mfp.m. File is similar to demo_2014_jasa.m, but
utilizes mfp.m for localization rather than ddmfp.m.