Clarified information about smartMallocSize

- Nathan Yong
Merge branch 'master' of github.com:TsukasaUjiie/srs-hhvm-notebook
Fix spelling error.

Maybe I should do more of these later when I've written stuff.

- Nathan Yong
Merge branch 'master' of github.com:TsukasaUjiie/srs-hhvm-notebook

Conflicts:
	presentation.md
Add more notes to notes.

- Nathan Yong
Merge branch 'master' of github.com:TsukasaUjiie/srs-hhvm-notebook

Conflicts:
	presentation.md
Merge branch 'master' of github.com:TsukasaUjiie/srs-hhvm-notebook
Add stubs for what to write about

The content will follow.

- Nathan Yong
Add information about PHP's type system

- Nathan Yong
Fix spelling error.
Update Nathan's presentation.
Merge branch 'master' of github.com:TsukasaUjiie/srs-hhvm-notebook