Add link text
Use brew --prefix to determine flex/bison path
Use the version on HEAD instead of pull from master
Add an input plugin for collectd

Close #992
rely more on go tools
add a link to types.db in the collectd's repo
include the go build options when we get the dependencies
Merge pull request #977 from chulkilee/contributing

Improve contributing.md
Aggregating by time should respect the natural boundaries of the argument.

Fix #387
Some refactoring
Merge branch 'groupby-boundaries'
Move admin assets into the compiled binary.

Fix #1032
Revert to older snapshots if the latest raft snapshot is corrupted

Fix #1040
catching up with latest code
Merge remote-tracking branch 'upstream/master'