Use NUL instead of spaces where there is no char
Add Dump Selection debug button
More NUL instead of spaces
Remove TextEntryProcessor
Proper selection handling (drawing + text copy) based on NUL char
Fix isNul() condition
Apply style when needed even in empty areas
Simplify NUL and queue handling
Fix comment
Add missing class
Merge remote-tracking branch 'origin/nul_char_bis' into 2.0_dev

Conflicts:
	src-terminal/com/jediterm/terminal/model/LinesBuffer.java
	src-terminal/com/jediterm/terminal/model/TerminalLine.java
	src-terminal/com/jediterm/terminal/model/TerminalTextBuffer.java