Merge branch 'working'
mostly finished need to test 2 ch processing
renamed readcall to processcalldata, is now a function
finished dealing with 2 channel setting
setting default nchan to 1 in chirocall
minor fix to save mat file
changed titles of channels to AIx in plots
Merge remote-tracking branch 'origin/installed'
Merge remote-tracking branch 'origin/installed'
checking into differential input
Merge branch 'installed'
Merge branch 'master' into installed
updated processcalldata

processcalldata can now either auto chunk the data or take a range of
time for a single chunk.  also, an input file name may be provided.
simplified reading/writing of single-chunk data
Merge branch 'installed_revised_processcall' into installed
Merge branch 'installed'
Merge branch 'master' into working