Continue to implement language manager.
On branch master, changes to be committed:
	modified:   src/syntaxhighlightmanager.cpp
	modified:   src/syntaxhighlightmanager.h
Implement lexer manager in editor.  (buggy)
On branch master, changes to be committed:
	modified:   src/scintillaeditor.cpp
	modified:   src/scintillaeditor.h
	modified:   src/syntaxhighlightmanager.cpp
	modified:   src/syntaxhighlightmanager.h
Fix bug language selector.
On branch master, hanges to be committed:
	modified:   src/scintillaeditor.cpp
	modified:   src/syntaxhighlightmanager.cpp
	modified:   src/syntaxhighlightmanager.h
Fix bug with white-space highlighting.
On branch master, changes to be committed:
	modified:   src/leptonlexer.cpp
	modified:   src/scintillaeditor.cpp
	modified:   src/syntaxhighlightmanager.cpp
	modified:   src/syntaxhighlightmanager.h
Fix bug with changing color of line number margin.
On branch master, changes to be committed:
	modified:   src/scintillaeditor.cpp