give sessiongenerator a master context for easy cancelling
style: Stop -> Close() error for Closer interface

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>
doc TODO

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>
Merge pull request #448 from jbenet/fix/test-memory-leak

fix: memory leak in epic tests
fix(epictest) generate data before starting benchmark

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>
Merge pull request #449 from jbenet/fix/benchmark-timer

fix(epictest) generate data before starting benchmark
fix bug where a file containing duplicate blocks would fail to be read properly
style(merkle): move var dec closer to use
fix(merkle) use defer
Update merkledag.go
change FindLink to FindLinks

cc @maybebtc
some cleanup, use WaitGroup over channel ugliness
fix FindLinks comment
cleanup from CR