Updated README grammar

"I really" to "I am really"
Merge pull request #12 from delasteve/patch-1

Updated README grammar
readme
Rewrite of intro dialog, thanks @Cogito Issue #13
Fixes Issue #15 thanks @caspark!
fix a typo in rebase1
Merge pull request #16 from dannvix/patch-2

fix a typo in rebase1
rebuilding after pull
fix an typo in mixed-2
readme
Merge pull request #17 from dannvix/typo-in-mixed2

fix a typo in mixed-2 Thanks Shao-Chung Chen, check out your name in the Readme!
rebuild
Fix incorrect commit number in intro 5
Update src/levels/intro/1.js

Fixed a little typo (the all the files)
Readme
readme
Fixes Issue #24
Merge pull request #23 from PragTob/patch-1

Fixed a little typo in the first lesson.
rebuild
Merge pull request #21 from lkysow/bugfix/typo-in-intro-5

Fix incorrect commit number in intro 5