Clarify usage of single quotes, not simple

' is more commonly known as a single quote.

Was pointed out in #792 by @harupong
Merge pull request #799 from randomecho/en-simple-single-quote

Clarify usage of single quotes, not simple
Synchronize command example with previous one

The file "README" is created/added by previous examples of the chapter.
Therefore, it's best for reader to use it as source for "git mv"
Update 01-chapter1.markdown

he traduit un parell de paragrafs.
dema més
Merge pull request #801 from JordiPujol/patch-1

Update 01-chapter1.markdown
Merge pull request #800 from nivalis/master

[ch2.2 / moving files] Synchronize command example with previous one
Merge branch 'progit/master' into ja