csl: Release CSL libraries

Problem / Solution

Finagle 6.36
Util 6.35
Ostrich 9.19
TwitterServer 1.21
Finatra 2.2.0
Scrooge 4.8.0

RB_ID=849873

Twitter OSS: Prepare libraries for next release

Problem

We're releasing the next versions of the Twitter OSS libraries:
util - 6.34.0
ostrich - 9.18.0
scrooge - 4.7.0
finagle - 6.35.0
twitter-server - 1.20.0
finatra - 2.1.6

Solution

Update to the release version.

RB_ID=826660

Bump versions - util/ostrich/finagle/scrooge/twitter-server

Prepare libraries for release.

RB_ID=809587

release: Prepare libraries for OSS release

RB_ID=796660

Prepare for open-source release of CSL libraries

RB_ID=796003

csl: Release OSS libraries

Finagle 6.31
Util 6.30
Scrooge 4.2
TwitterServer 1.16
Ostrich 9.14

RB_ID=774633
TBR=true

csl: bump lib versions

RB_ID=756082
TBR=true

Release CSL libraries (Sept 2015).

- Release finagle, ostrich, scrooge, twitter-server, util (Sept 2015).

RB_ID=747942

Release CSL stack

RB_ID=735615

Release CSL Stack

RB_ID=721327