Update README.md

[CmptAdam]

This file has been edited by a Computer Science student in a Technical Writing course. The students are tasked in finding online real-world documentation to edit. Full marks are achieved if the original author of the work accepts the changes; in this case a Pull Request.
Please review and accept the Pull Request and thank you so much!

[garrettw]

This is not an improvement; there are numerous grammatical errors. Here are a few big ones:

• "Reason why that" is wrong; should be "reason that"
  • The correct grammar for a "reason" clause is "The reason that (something is true) is (explanation)."
• "PHPixie" should not have "the" in front of it when used as a noun
• ", therefore;" is never right; should be "; therefore,"

If you make a new commit with some fixes, it will automatically show up here so it can be accepted.

[garrettw]

Please close either this PR or your other one. Two are not necessary for changes to the same thing.