[added] qsrc extension for npp syntax highlighting.

QSP1.xml

@@ -1,5 +1,5 @@
 <NotepadPlus>
-    <UserLang name="QSP1" ext="" udlVersion="2.1">
+    <UserLang name="QSP1" ext="qsrc" udlVersion="2.1">
         <Settings>
             <Global caseIgnored="yes" allowFoldOfComments="yes" foldCompact="no" forcePureLC="2" decimalSeparator="2" />
             <Prefix Keywords1="yes" Keywords2="no" Keywords3="no" Keywords4="no" Keywords5="no" Keywords6="no" Keywords7="no" Keywords8="no" />

QSP4.xml

@@ -1,5 +1,5 @@
 <NotepadPlus>
-    <UserLang name="QSP4" ext="" udlVersion="2.1">
+    <UserLang name="QSP4" ext="qsrc" udlVersion="2.1">
         <Settings>
             <Global caseIgnored="yes" allowFoldOfComments="yes" foldCompact="yes" forcePureLC="2" decimalSeparator="2" />
             <Prefix Keywords1="yes" Keywords2="no" Keywords3="no" Keywords4="no" Keywords5="no" Keywords6="no" Keywords7="no" Keywords8="no" />