Add standards note about UTF-8 encoding for other languages.
Remaining nitpicks from Mark & JM
Fixing links I broke
Fixing ImportLibrary as per Josh's suggestion
Tutorials to training material & redo index page
merge dev_4_4 -D org -I include -E conflict -E needs-fixes -E broken: PR 245 (Add note about Java UTF-8 source in Insight.)
merge dev_4_4 -D org -I include -E conflict -E needs-fixes -E broken: PR 254 (Developer docs tidy 3)
merge dev_4_4 -D org -I include -E conflict -E needs-fixes -E broken: PR 255 (Redo user doc front page & replace old tutorials with training materials)