Fix clang compiler error: missing <stdexcept> to use std::runtime_error
Fix initialization order of DocumentExporter fields
Deselect timeline range when we modify sprite selection

Fix a problem selecting one cel in the timeline, using Ctrl+A and then
Ctrl+C to copy the whole image area. (This indicates that the user want
to copy the cel content, not the timeline cel.)
Fix position of the pasted image
Merge branch '1.0'

Conflicts:
	src/app/document.cpp
Update version to 1.1.0-dev