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>

subsurface-core/pref.h

@@ -0,0 +1,158 @@
+#ifndef PREF_H
+#define PREF_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "units.h"
+#include "taxonomy.h"
+
+/* can't use 'bool' for the boolean values - different size in C and C++ */
+typedef struct
+{
+	short po2;
+	short pn2;
+	short phe;
+	double po2_threshold;
+	double pn2_threshold;
+	double phe_threshold;
+} partial_pressure_graphs_t;
+
+typedef struct {
+	char *access_token;
+	char *user_id;
+	char *album_id;
+} facebook_prefs_t;
+
+typedef struct {
+	bool enable_geocoding;
+	bool parse_dive_without_gps;
+	bool tag_existing_dives;
+	enum taxonomy_category category[3];
+} geocoding_prefs_t;
+
+enum deco_mode {
+	BUEHLMANN,
+	RECREATIONAL,
+	VPMB
+};
+
+struct preferences {
+	const char *divelist_font;
+	const char *default_filename;
+	const char *default_cylinder;
+	const char *cloud_base_url;
+	const char *cloud_git_url;
+	double font_size;
+	partial_pressure_graphs_t pp_graphs;
+	short mod;
+	double modpO2;
+	short ead;
+	short dcceiling;
+	short redceiling;
+	short calcceiling;
+	short calcceiling3m;
+	short calcalltissues;
+	short calcndltts;
+	short gflow;
+	short gfhigh;
+	int animation_speed;
+	bool gf_low_at_maxdepth;
+	bool show_ccr_setpoint;
+	bool show_ccr_sensors;
+	short display_invalid_dives;
+	short unit_system;
+	struct units units;
+	bool coordinates_traditional;
+	short show_sac;
+	short display_unused_tanks;
+	short show_average_depth;
+	short zoomed_plot;
+	short hrgraph;
+	short percentagegraph;
+	short rulergraph;
+	short tankbar;
+	short save_userid_local;
+	char *userid;
+	int ascrate75; // All rates in mm / sec
+	int ascrate50;
+	int ascratestops;
+	int ascratelast6m;
+	int descrate;
+	int bottompo2;
+	int decopo2;
+	int proxy_type;
+	char *proxy_host;
+	int proxy_port;
+	short proxy_auth;
+	char *proxy_user;
+	char *proxy_pass;
+	bool doo2breaks;
+	bool drop_stone_mode;
+	bool last_stop;   // At 6m?
+	bool verbatim_plan;
+	bool display_runtime;
+	bool display_duration;
+	bool display_transitions;
+	bool safetystop;
+	bool switch_at_req_stop;
+	int reserve_gas;
+	int min_switch_duration; // seconds
+	int bottomsac;
+	int decosac;
+	int o2consumption; // ml per min
+	int pscr_ratio; // dump ratio times 1000
+	int defaultsetpoint; // default setpoint in mbar
+	bool show_pictures_in_profile;
+	bool use_default_file;
+	short default_file_behavior;
+	facebook_prefs_t facebook;
+	char *cloud_storage_password;
+	char *cloud_storage_newpassword;
+	char *cloud_storage_email;
+	char *cloud_storage_email_encoded;
+	bool save_password_local;
+	short cloud_verification_status;
+	bool cloud_background_sync;
+	geocoding_prefs_t geocoding;
+	enum deco_mode deco_mode;
+	short conservatism_level;
+};
+enum unit_system_values {
+	METRIC,
+	IMPERIAL,
+	PERSONALIZE
+};
+
+enum def_file_behavior {
+	UNDEFINED_DEFAULT_FILE,
+	LOCAL_DEFAULT_FILE,
+	NO_DEFAULT_FILE,
+	CLOUD_DEFAULT_FILE
+};
+
+enum cloud_status {
+	CS_UNKNOWN,
+	CS_INCORRECT_USER_PASSWD,
+	CS_NEED_TO_VERIFY,
+	CS_VERIFIED
+};
+
+extern struct preferences prefs, default_prefs, informational_prefs;
+
+#define PP_GRAPHS_ENABLED (prefs.pp_graphs.po2 || prefs.pp_graphs.pn2 || prefs.pp_graphs.phe)
+
+extern const char *system_divelist_default_font;
+extern double system_divelist_default_font_size;
+
+extern const char *system_default_directory(void);
+extern const char *system_default_filename();
+extern bool subsurface_ignore_font(const char *font);
+extern void subsurface_OS_pref_setup();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // PREF_H