replace "Post。find()" with “Post.find()”

should use english dot in the code.
Merge pull request #17 from zwang/patch-1

replace "Post。find()" with “Post.find()”
Merge pull request #24 from marshallshen/master

Transalte chapter 9
Merge pull request #25 from marshallshen/master

fix slugs
Fix a litter bug in the 2nd chapter.
Fix “，” to “,”
Remove a strange icon.
Update 04-collections.md.erb
Fix many bugs in chapter-04s.
Fix, use {{> yield}} tag instead of {{yield}}.

See: https://github.com/DiscoverMeteor/Microscope/commit/chapter5-1#diff-86268a1481d515783ec8f86fe20f0fd6R9
Merge pull request #27 from lijunle/patch-04s

Fix many bugs in chapter-04s.
Fix a missing command in router.js

See: https://github.com/DiscoverMeteor/Microscope/commit/chapter5-2#diff-504fd89f344be1e9c4b583f3ebd7428aR11
Merge pull request #26 from lijunle/patch-1

Fix some trivial bugs
Fix two trivial bugs in chapter-05.
Merge pull request #28 from lijunle/patch-05

Fix some bugs in Chapter 05
Translate the latest part in Chapter 04s.
Merge pull request #30 from lijunle/translate-chapter-04s

Translate the latest part in Chapter 04s.
Polish Chapter 5, Routing.
Merge pull request #32 from lijunle/polish-chapter5

Polish Chapter 5, Routing.