grammar fixes
Merge pull request #6 from matalangilbert/patch-1

grammar fixes
03.5.md
chapter 3 review 1
04.0.md
04.1.md
readme
Update README.md

Made wording of the introductory paragraph feel more like native English.
Update 01.0.md

Making the English read more natively.
Merge pull request #7 from carbocation/patch-1

Update README.md
Merge pull request #8 from carbocation/master

Ch 01.0 revisions
readme
04.2.md
04.3.md
04.6.md
pic
05.0.md
Update 02.5.md

I tried making the first sentence a little easier to read.
Merge pull request #9 from metasansana/patch-1

Update 02.5.md
Add some details, fix a word.