Adding Toronto to the list of PWL chapters.
fixes #204

previous broken url replaced with another copy of the paper
Generalize the garbage collection directory

Rather than artificially separate garbage collection from other classes
of memory management, I propose moving garbage collection topics under
the more general label of memory management ("storage management" or
"memory allocation" might be reasonable alternatives).
Add ScatterAlloc paper

This paper was celebrated at PWLMTL#2 by Peter Zion, who also used it as
a springboard to discuss GPU architecture in general, as well as his
implementation based on the paper in the Fabric Engine
framework (fabricengine.com).
Add procedural modeling and shape grammar links
Add link to Dwork's seminal Differential Privacy

An essential topic in our machine learning and big data-hungry world.
Merge pull request #205 from borgified/master

fixes #204
Merge pull request #206 from tokenrove/add-scatteralloc

Add ScatterAlloc paper
Merge pull request #202 from dkua/patch-1

Adding Toronto to the list of PWL chapters.
Merge pull request #207 from tokenrove/add-shape-grammar-papers

Add procedural modeling and shape grammar links
Merge pull request #208 from tokenrove/add-differential-privacy-paper

Add link to Dwork's seminal Differential Privacy
Added Hamburg meetup group
Merge pull request #209 from justjoheinz/patch-1

Added Hamburg meetup group
pwl paper for dec
Dallas chapter.
Merge pull request #213 from michaellperry/dallas

Dallas chapter.
Merge pull request #212 from papers-we-love/dec-ny-paper

Add "On the resemblance and containment of documents" in the new clustering algorithms directory.

This paper is for the NYC December 2014 meetup.
Update README.md
Delete chubby-lock-service-for-loosely-coupled-distributed-systems.pdf

as per https://github.com/papers-we-love/papers-we-love/issues/214.
Add logo to README