* current changes
* change algorithm for tree insert
* almost done with getting this to pass
* unit test passes
* tests now pass
* fix in repo
* Merge branch 'master' into optimizeDepositLogs
* fix build
* Merge branch 'optimizeDepositLogs' of github.com:prysmaticlabs/prysm into optimizeDepositLogs
* remove tautology
* fix tautology
* fix up sparsity
* Merge branch 'master' into optimizeDepositLogs
* further fixes
* Merge branch 'optimizeDepositLogs' of github.com:prysmaticlabs/prysm into optimizeDepositLogs
* Update shared/trieutil/sparse_merkle.go
* comments
* Merge branch 'optimizeDepositLogs' of github.com:prysmaticlabs/prysm into optimizeDepositLogs
* add bench for optimized
* gaz
* Merge refs/heads/master into optimizeDepositLogs
