Move all core-functionality to subsurface-core

And adapt a new CMakeLists.txt file for it. On the way I've also
found out that we where double-compilling a few files. I've also
set the subsurface-core as a include_path but that was just to
reduce the noise on this commit, since I plan to remove it from
the include path to make it obligatory to specify something like

 include "subsurface-core/dive.h"

for the header files. Since the app is growing quite a bit we ended
up having a few different files with almost same name that did
similar things, I want to kill that (for instance Dive.h, dive.h,
PrintDive.h and such).

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/CMakeLists.txt

@@ -4,6 +4,10 @@ qt5_wrap_ui(SUBSURFACE_UI_HDRS ${SUBSURFACE_UI})
 qt5_add_resources(SUBSURFACE_RESOURCES subsurface.qrc)
 source_group("Subsurface Interface Files" FILES ${SUBSURFACE_UI})
 
+if(BTSUPPORT)
+	set(BT_SRC_FILES btdeviceselectiondialog.cpp)
+endif()
+
 # the interface, in C++
 set(SUBSURFACE_INTERFACE
 	updatemanager.cpp

qt-ui/configuredivecomputerdialog.h

@@ -4,7 +4,7 @@
 #include <QDialog>
 #include <QStringListModel>
 #include "ui_configuredivecomputerdialog.h"
-#include "../libdivecomputer.h"
+#include "subsurface-core/libdivecomputer.h"
 #include "configuredivecomputer.h"
 #include <QStyledItemDelegate>
 #include <QNetworkAccessManager>

qt-ui/divelogimportdialog.h

@@ -9,8 +9,8 @@
 #include <QAbstractTableModel>
 #include <QStyledItemDelegate>
 
-#include "../dive.h"
-#include "../divelist.h"
+#include "subsurface-core/dive.h"
+#include "subsurface-core/divelist.h"
 
 namespace Ui {
 	class DiveLogImportDialog;

qt-ui/graphicsview-common.h

@@ -1,7 +1,7 @@
 #ifndef GRAPHICSVIEW_COMMON_H
 #define GRAPHICSVIEW_COMMON_H
 
-#include "../color.h"
+#include "subsurface-core/color.h"
 #include <QMap>
 #include <QVector>
 #include <QColor>