Draws a small part of the Mandelbrot Set using SDL2.0.

Uncomment line 5 in main.cpp to draw the whole set.

Uncomment line 121 in fractal.cpp to draw just the fractal.

Notes:

1. Lines 28 and 29 are the values the custom location is centered at.

2. Lines 31 and 32 are the min and max values of x, which, along with the width of the rendering
   window, determines the level of magnification.

3. Currently, you need to know the point and min and max values of x for the image you want to draw.

4. Execution time is heavily affected by the window dimensions (lines 9 and 10).

5. Execution time is also heavily affected with very large values of MAX_ITERATION when the image
   being drawn contains many points that are considered a part of the Mandelbrot Set. Currently,
   this program has no boundary detection to check if a point is part of the set before iterating
   the fractal's formula, so those points will always iterate the maximum number of times.

   The first sample location is a good example - it takes a little over 1 minute to finish drawing
   and display the final image, whereas the location I used for the image shown in class took around
   3 seconds.

   However, some locations at high magnification will appear to be a part of the set (i.e., a black
   image) with too low of a value for MAX_ITERATION.


6. Here are a couple sample values for other interesting locations:
   (Just replace the appropriate values in main.cpp with the ones below)

/* Sample 1
const int MAX_ITERATION = 14000;

const double x = -0.74364386269;
const double y =  0.13182590271;

const double min_x = -0.74364393032000194;
const double max_x = -0.74364379505999806;
*/

/* Sample 2
const int MAX_ITERATION = 2500;

const double x = -0.743861259985424936;
const double y =  0.131919520083265748;

const double min_x = -0.7438631541940171;
const double max_x = -0.7438593657768327;
*/