Fix names parser issue with upper case keywords

(issue introduced with last commit)
Fix variable/paragraphes case not respected, and add a test for lower case convention

See OpenCobolIDE/OpenCobolIDE87
Catch runtime error when disconnecting old editor's signals.

Should fix OpenCobolIDE/OpenCobolIDE#89
Keep formatting when indenting characters before column 7 (non-free)

Fix OpenCobolIDE/OpenCobolIDE#90
Fix names parser bug if there are whitespace between the type of a division and the DIVISION statement.

Fix issue where storage section data were not shown when editing PCTB003B.scb (from the dpre project).
Fix OpenCobolIDE/OpenCobolIDE#93
Integrate master

Conflicts:
	pyqode/cobol/api/keywords.py