Major code reorganization

This commit only updates the XCode project for the changes.
A later commit each will update it for scons and MSVC.

A few actual changes are mixed in:
- Add a prefix header for a handful of common definitions
- Moved current_cursor into the Cursor class as a static member
- Removed the make_cursor_sword and make_cursor_watch functions
- Include tests in the All target
- Remove redundant -l flags for Common and Common-Party (since they're included in the Link phases anyway)

src/mathutil.cpp

@@ -0,0 +1,65 @@
+/*
+ *  mathutil.cpp
+ *  BoE
+ *
+ *  Created by Celtic Minstrel on 16/04/09.
+ *
+ */
+
+#include <cstdlib>
+#include "mathutil.hpp"
+
+short get_ran (short times,short  min,short  max){
+	long int store;
+	short to_ret = 0;
+	
+	if(max < min) max = min;
+	if(max == min) return times * min;
+	
+	for(short i = 1; i < times + 1; i++) {
+		store = rand();
+		to_ret += min + (store % (max - min + 1));
+	}
+	return to_ret;
+}
+
+short max(short a,short b){
+	if(a > b)
+		return a;
+	else return b;
+}
+
+short min(short a,short b){
+	if(a < b)
+		return a;
+	else return b;
+}
+
+short minmax(short min,short max,short k){
+	if(k < min)
+		return min;
+	if(k > max)
+		return max;
+	return k;
+}
+
+short gcd(short a, short b){ // Grabbed from Wikipedia and translated to C code
+	short t;
+	while(b != 0){
+		t = b;
+		b = a % b;
+		a = t;
+	}
+	return a;
+}
+
+// According to Macintosh Toolbox Essentials, a tick is about 1/60ths of a second.
+sf::Time time_in_ticks(int ticks) {
+	unsigned long long micro = ticks;
+	micro *= 1000;
+	micro *= 1000;
+	micro /= 60;
+	return sf::microseconds(micro);
+}
+
+