Rename all to filenames with plain letters
 Typo fix in sha2 and doxygen headers correction
dsp section now has moving_av and leaky_int filters

1) Moving Average and Leaky integrator filters are in seperate files
2) The function names are now in plain letters
3) Filters.c/h files deleted.
BUGFIX: #1, memset had wrong memory address argument
stime in now ported to new scheme.

1) a working sgmtime() added
2) inleap() added
3) JULIAN_CALENDAR and GREGORIAN_CALENDAR macro added for compile time
4) smktime() improvements:wq
Example/Test project changes
stime.c/h function names correction