Fixing README.md

README.md

@@ -21,22 +21,24 @@ These new satellites will have pointing capabilities, with a robust attitude det
 
 ## 2.- Description
 
-- This GitHub contains a fully functional Star Tracker that you can test on a Linux PC. Nevertheless, the main idea is to use it with a Raspberry Pi (RPi) and its camera (V2.1) in an autonomously way.
+- This GitHub contains a fully functional Star Tracker that you can test on a Linux PC. 
+Nevertheless, the main idea is to use it with a Raspberry Pi (RPi) and its camera (V2.1) in an autonomously way.
 - This code is written in _Python 2.7_. All the code and the necessary files are in the __RPI__ folder.
-- This GitHub is __free__ and __open__ to everyone interested in using it, __especially researchers working on CubeSats.__ We encourage interested 
-researchers to aid in growing up this project!
+- This GitHub is __free__ and __open__ to everyone interested in using it, __especially researchers working on CubeSats.__ 
+We encourage interested researchers to aid in growing up this project!
 
 ## 3.- Installation instructions
 
 1. Two open software commonly used in the astronomy field: __Source Extractor__ and __Match__, are the base of this STT code. To use this STT, you need to install first these two software. You can do it manually in the following way: <br />
-    A.1.- Get and install [Source Extractor.](https://www.astromatic.net/software/sextractor)
+    1.1.- Get and install [Source Extractor.](https://www.astromatic.net/software/sextractor)
 You can find this program in the Linux (RPI) repository, and install it by typing in the terminal:
-```bash
-sudo apt install sextractor
-```
+    ```bash
+    sudo apt install sextractor
+    ```
     We use __version 2.19.5__ in our implementation. <br />
-    A.2.- Get and install [Match](http://spiff.rit.edu/match/). We use __version 0.14__ in our program.<br />
-As an alternative to his installation, you also can install these software using the script called _stt_installer.sh_, which is in the __RPI__ folder. Type the following in the terminal:
+    1.2.- Get and install [Match](http://spiff.rit.edu/match/). We use __version 0.14__ in our program.<br />
+As an alternative to this installation, you also can install these software using the script called _stt_installer.sh_, 
+which is in the __RPI__ folder. Type the following in the terminal:
 ```bash
 cd RPI
 ./stt_installer.sh