applying obvious metadata renames

section_system_description -> section_system
cell_associated -> cell_dependent

parser/parser-exciting/parser_exciting.py

@@ -43,7 +43,7 @@ mainFileDescription = \
 	   SM(name = 'input',
               startReStr = r"\|\sStarting initialization",
               endReStr = r"\|\sEnding initialization",
-              sections = ['section_system_description'],
+              sections = ['section_system'],
               subMatchers = [
                 SM(startReStr = r"\sLattice vectors \(cartesian\) :",
                    endReStr = r"\sReciprocal lattice vectors \(cartesian\) :",