Merge pull request #1 from raspitv/master

Correct use of GPIO.cleanup()
Change bold headers to proper headings
Fix wget command

The URL was previously set as the GitHub page, which would download the HTML of that web page. Instead I use the raw link to the file. Also to ensure the file is saved with the original filename, I added the -O flag and provided a filename.
Merge remote-tracking branch 'upstream/master'

Merging Bens changes into local branch

Modification to merge Ben's changes#