Updated readme. Going through first chapter

ch_01/hello_world/hello_world.c

@@ -0,0 +1,14 @@
+/*
+ * Simple hello world application
+ *
+ * Author: Kun Deng
+ */
+
+#include <stdio.h>
+
+int main()
+{
+    printf("hello, world\n");
+
+    return 0;
+}

ch_01/new_line_character/new_line.c

@@ -0,0 +1,16 @@
+/*
+ * Another way to print a new line
+ *
+ * Author: Kun Deng
+ */
+
+#include <stdio.h>
+
+int main()
+{
+    char new_line = 0x0A;
+
+    printf("hello, world%c", new_line);
+
+    return 0;
+}

ch_01/temperature_conversion/conversion.c

@@ -0,0 +1,23 @@
+/*
+ * Converts temperatures from fehrenheit to celsius starting from 0 to 200. Incrementing by 10
+ *
+ * Author: Kun Deng
+ */
+
+#include <stdio.h>
+
+#define UPPER 200
+#define LOWER 0
+#define STEP 10
+
+int main(int argc, char **argv)
+{
+    printf("%13s %13s\n", "fahrenheit", "celsius");
+
+    for (double fahrenheit = LOWER; fahrenheit <= UPPER; fahrenheit = fahrenheit + STEP)
+    {
+        printf("%13.2f %13.2f\n", fahrenheit, ((fahrenheit - 32) * 5.0 / 9.0));
+    }
+
+    return 0;
+}