Move subsurface-core to core and qt-mobile to mobile-widgets

Having subsurface-core as a directory name really messes with
autocomplete and is obviously redundant. Simmilarly, qt-mobile caused an
autocomplete conflict and also was inconsistent with the desktop-widget
name for the directory containing the "other" UI.

And while cleaning up the resulting change in the path name for include
files, I decided to clean up those even more to make them consistent
overall.

This could have been handled in more commits, but since this requires a
make clean before the build, it seemed more sensible to do it all in one.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

mobile-widgets/qml/About.qml

@@ -0,0 +1,59 @@
+import QtQuick 2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts 1.1
+import org.kde.kirigami 1.0 as Kirigami
+import org.subsurfacedivelog.mobile 1.0
+
+Kirigami.ScrollablePage {
+	id: aboutPage
+	property int pageWidth: subsurfaceTheme.columnWidth - Kirigami.Units.smallSpacing
+	title: "About Subsurface-mobile"
+
+	ColumnLayout {
+		spacing: Kirigami.Units.largeSpacing
+		width: aboutPage.width
+		Layout.margins: Kirigami.Units.gridUnit / 2
+
+
+		Kirigami.Heading {
+			text: "About Subsurface-mobile"
+			Layout.topMargin: Kirigami.Units.gridUnit
+			Layout.alignment: Qt.AlignHCenter
+			Layout.maximumWidth: pageWidth
+			wrapMode: TextEdit.WrapAtWordBoundaryOrAnywhere
+		}
+		Image {
+			id: image
+			source: "qrc:/qml/subsurface-mobile-icon.png"
+			width: pageWidth / 2
+			height: width
+			fillMode: Image.Stretch
+			Layout.alignment: Qt.AlignCenter
+			horizontalAlignment: Image.AlignHCenter
+		}
+
+		Kirigami.Heading {
+			text: "A mobile version of the free Subsurface divelog software.\n" +
+				"View your dive logs while on the go."
+			level: 4
+			Layout.alignment: Qt.AlignHCenter
+			Layout.topMargin: Kirigami.Units.largeSpacing * 3
+			Layout.maximumWidth: pageWidth
+			wrapMode: TextEdit.WrapAtWordBoundaryOrAnywhere
+			anchors.horizontalCenter: parent.Center
+			horizontalAlignment: Text.AlignHCenter
+		}
+
+		Kirigami.Heading {
+			text: "Version: " + manager.getVersion() + "\n\n© Subsurface developer team\n2011-2016"
+			level: 5
+			font.pointSize: subsurfaceTheme.smallPointSize + 1
+			Layout.alignment: Qt.AlignHCenter
+			Layout.topMargin: Kirigami.Units.largeSpacing
+			Layout.maximumWidth: pageWidth
+			wrapMode: TextEdit.WrapAtWordBoundaryOrAnywhere
+			anchors.horizontalCenter: parent.Center
+			horizontalAlignment: Text.AlignHCenter
+		}
+	}
+}