Add -n option for normal project type

For consistency, I added this option, so any project type can be
explicitly specified. Of course, this option is the default, so it can
be left out to yield the existing behaviour.

mkproj.sh

@@ -10,7 +10,7 @@ simple=0
 usegitroot=0
 
 usage() {
-    echo "usage: $progname [-f|-l|-s] [[-d] -g <gitroot>|-G] [-t <tplroot>] PROJECTNAME" >&2
+    echo "usage: $progname [-f|-l|-n|-s] [[-d] -g <gitroot>|-G] [-t <tplroot>] PROJECTNAME" >&2
     exit 1
 }
 
@@ -30,7 +30,7 @@ check_gitroot() {
 progname=${0##*/}
 
 # option processing, using silent mode
-while getopts :dfGg:lst:v opt
+while getopts :dfGg:lnst:v opt
 do
     case $opt in
         d)
@@ -49,6 +49,11 @@ do
         l)
             library=1
             ;;
+        n)
+            mainfile=main.cpp
+            library=0
+            simple=0
+            ;;
         s)
             simple=1
             ;;