Code cleanup, new v0.0.2 features and s fixed.

- Changed the word "Update" to "Refresh" in variable names and in
comments as well. This will help to understand the code better.
- Changed the word in boolean "Values" to "States".
- The values of the graphs and home screens were completely wrong and
now they are completely right .
- Analog pins weren’t set as INPUTS and now they are. 
- The home screens now could be updated at a certain interval. 
- Startup time was increased by two seconds in order to show the
version and the welcome screen.