implement binary search tree in Go
ruby/clock spec: test wrapping around backwards.
Merge pull request #1393 from stevenwu/develop

Allow fetching of next exercise when you have hibernating submissions
Strip trailing whitespace.
Clarify precedence in query
Merge pull request #1390 from henrik/patch-9

ruby/clock spec: test wrapping around backwards.
Ditch accumulate exercise in coffeescript
Revert "Ditch accumulate exercise in coffeescript"

This reverts commit e59d576dd3cf98fb7631972d499df58191d7837a.
Deprecate accumulate in coffeescript
add `skip` to some ruby tests
Merge pull request #1396 from alxndr/ruby-test-tweaks

add `skip` to some ruby tests
Delete left-over code in go/word-count tests
Move type definition into separate file in go/word-count
Improve test suite in go/hamming
Clarify the size of a gigasecond. Fixes #1399
Fixed test for word-count: missing 'expected' and 'actual' variables
skip remaining unskipped ruby tests
Merge pull request #1400 from alxndr/skip-more-ruby-tests

skip remaining unskipped ruby tests
Added benchmark in go/anagram
reversed the test to make it more readable and similar to the previous tests