wmake: General cleanup to improve consistency and maintainability

The Makefiles are now in the makefiles sub-directory

The "-f | -force" option in wmakeLnInclude is now "-u | -update" for
consistency with the other scripts.

The "Usage" entry in the headers is now consistently formatted in all
scripts.

wmake/makefiles/apps

@@ -0,0 +1,42 @@
+#-------------------------------*- makefile -*---------------------------------
+# =========                 |
+# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+#  \\    /   O peration     |
+#   \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
+#    \\/     M anipulation  |
+#------------------------------------------------------------------------------
+# License
+#     This file is part of OpenFOAM.
+#
+#     OpenFOAM is free software: you can redistribute it and/or modify it
+#     under the terms of the GNU General Public License as published by
+#     the Free Software Foundation, either version 3 of the License, or
+#     (at your option) any later version.
+#
+#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+#     for more details.
+#
+#     You should have received a copy of the GNU General Public License
+#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+#
+# File
+#     wmake/makefiles/apps
+#
+# Description
+#     Makefile used by
+#         wmake -all
+#     to make the applications in the subdirectories of the current directory
+#
+#------------------------------------------------------------------------------
+
+.PHONY: application
+application: $(FOAM_APPS)
+
+.PHONY: $(FOAM_APPS)
+$(FOAM_APPS):
+	+@wmake -all $(TARGET) $@
+
+
+#------------------------------------------------------------------------------