Use fromstring() instead of fromarray()

Trac#11912 PIL < 1.1.7 fromarray doesn't handle 16 bit images properly, use fromstring as a workaround
merge develop -D org -I include -E exclude: PR 60 (Kymograph_Analysis creates single csv. See #11909)
merge develop -D org -I include -E exclude: PR 62 (Use fromstring() instead of fromarray() #11912)