Update pycharm.md (fixed typos etc)

pycharm.md

 # Installing PyCommandCenter in PyCharm
 
-Start of by download the library from the [PyCommandCenter repository](https://gitlab.ida.liu.se/course-starcraft-ai/pycommandcenter/tags).
+Start by downloading the library from the [PyCommandCenter repository](https://gitlab.ida.liu.se/course-starcraft-ai/pycommandcenter/tags).
 
 Place the library in your repository.
 
 Add the library to the Python path in Python by:
 
-1. File->Settings->Project: (project name)->Project Interpreter
-2. Select the cog in the upper right corner and select "Show All" 
-3. In the new window that opens select the icon which shows a few folders connected with lines
-4. In the new window press the plus icon and select the path of your repository (should be where you placed the library)
-5. Restart PyCharm with File->Invalidate Caches/Restart->Invalidate and Restart
+1. File->Settings->Project: (project name)->Project Interpreter.
+2. Select the cog in the upper right corner and select "Show All".
+3. In the new window that opens, select the icon which shows a few folders connected with lines.
+4. In the new window, first press the plus icon, and then select the path of your repository (the path to where you placed the library).
+5. Restart PyCharm with "File->Invalidate Caches/Restart->Invalidate and Restart".
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