Fix usage text and rename executable

.gitignore

@@ -1,6 +1,6 @@
 colors.h
 colors.txt
-minetest_mapper
+minetestmapper
 CMakeCache.txt
 CMakeFiles/
 Makefile

CMakeLists.txt

@@ -68,13 +68,13 @@ set(mapper_SRCS
 	mapper.cpp
 )
 
-add_executable(minetest_mapper
+add_executable(minetestmapper
 	${mapper_HDRS}
 	${mapper_SRCS}
 )
 
 target_link_libraries(
-	minetest_mapper
+	minetestmapper
 	${LIBSQLITE3_LIBRARIES}
 	gd
 	z

mapper.cpp

@@ -19,18 +19,18 @@ using namespace std;
 
 void usage()
 {
-	 const char *usage_text = "minetestmapper.py [options]\n\
+	const char *usage_text = "minetestmapper [options]\n"
-  -i/--input <world_path>\n\
+			"  -i/--input <world_path>\n"
-  -o/--output <output_image.png>\n\
+			"  -o/--output <output_image.png>\n"
-  --bgcolor <color>\n\
+			"  --bgcolor <color>\n"
-  --scalecolor <color>\n\
+			"  --scalecolor <color>\n"
-  --playercolor <color>\n\
+			"  --playercolor <color>\n"
-  --origincolor <color>\n\
+			"  --origincolor <color>\n"
-  --drawscale\n\
+			"  --drawscale\n"
-  --drawplayers\n\
+			"  --drawplayers\n"
-  --draworigin\n\
+			"  --draworigin\n"
-  --geometry x:y+w+h\n\
+			"  --geometry x:y+w+h\n"
-Color format: '#000000'\n";
+			"Color format: '#000000'\n";
 	std::cout << usage_text;
 }