modified basic usage sample in readme

[SYctonu]

#Hi,
I installed TemPy on my Windows machine and used IDLE (Python 3.6) to run the first sample code in the README, under basic usage. The HTML tags did not all render as given in the sample, so I made a few changes, mostly under # add tags and content later, tested them successfully on IDLE, and updated the README accordingly. This is my first OSS contribution, for a school assignment; you can find more details of my process here. I hope it helps!
Happy Thanksgiving

[coveralls]

Coverage remained the same at 98.754% when pulling 1949def on SYctonu:readme-edit into b78e707 on Hrabal:master.

[coveralls]

Coverage remained the same at 98.754% when pulling 1949def on SYctonu:readme-edit into b78e707 on Hrabal:master.

[coveralls]

Coverage remained the same at 98.754% when pulling 1949def on SYctonu:readme-edit into b78e707 on Hrabal:master.

[coveralls]

Coverage remained the same at 98.754% when pulling 1949def on SYctonu:readme-edit into b78e707 on Hrabal:master.

[Hrabal]

Hi @SYctonu , thanks for your contribution! I'll add your changes also in the gh-pages branch, where I'm trying to write a complete documentation for the project.