Embedded document gives a handle
Code style fixes on OutlineImpl
Add event for document changes
Add an interface for pixel to/from text positions conversions
Remove nested EmbeddedDocument.TextPosition
Add a method to get the document size
Check exception during document storage actions
Don't use a null callback but an no-op one
Removed useless and duplicated imports
Add interfaces for code assistant
Merge pull request #209 from mleduque/PLGEDT-39-part2

PLGEDT-39 Add interface for code completion