add folders in calFiles and maskFiles

[wangzy]

add subfolders in cals and masks thus different cycles' cals can be separated.

[wangzy]

build folders and subfolders

[wangzy]

set default root path to find calibration file

[wangzy]

save that calibration file route and use that route to find mask,monitor and detector files
split and save both cal file name and route of file name

[wangzy]

only for cal file, the full route is saved in the xml files, for mask\monitor\detector files, no route file saved

[wangzy]

add a button for showing cal route of cycle, thus the boxes to show cal file won't need to show path

[wangzy]

save cycle path into xml

[wangzy]

read path in reduction.py

[wangzy]

change files to load xmls for monitor,detector,mask and cal