updated readme with info on adding new background images

README.md

@@ -1,8 +1,8 @@
-#SynthText
+# SynthText
 Code for generating synthetic text images as described in ["Synthetic Data for Text Localisation in Natural Images", Ankush Gupta, Andrea Vedaldi, Andrew Zisserman, CVPR 2016](http://www.robots.ox.ac.uk/~vgg/data/scenetext/).
 
 
-**Synthetic Scene-Text Image Samples**
+** Synthetic Scene-Text Image Samples**
 ![Synthetic Scene-Text Samples](samples.png "Synthetic Samples")
 
 The library is written in Python. The main dependencies are:
@@ -11,7 +11,7 @@ The library is written in Python. The main dependencies are:
 pygame, opencv (cv2), PIL (Image), numpy, matplotlib, h5py, scipy
 ```
 
-###Generating samples
+### Generating samples
 
 ```
 python gen.py --viz