Merge pull request #1451 from clearpathrobotics/master

Removed clearpath_turtlebot docs from Groovy.
pcl_conversions: 0.0.1-0 in 'groovy/release.yaml' [bloom]
Merge pull request #1453 from wjwwood/bloom-patch-14

pcl_conversions: 0.0.1-0 in 'groovy/release.yaml' [bloom]
ros_control: 0.5.0-0 in 'hydro/release.yaml' [bloom]
Merge pull request #1454 from davetcoleman/bloom-patch-1

ros_control: 0.5.0-0 in 'hydro/release.yaml' [bloom]
add rocon package and update rocon_concert package to 0.5.4
Merge pull request #1455 from hughie/patch-5

add rocon package and update rocon_concert package to 0.5.4
Turtlebot apps version: 2.1.0-3
Merge pull request #1457 from corot/patch-10

Turtlebot apps version: 2.1.0-3
add rocon package
update rocon_multimaster to 0.5.4
Merge pull request #1458 from hughie/patch-6

add rocon package
Merge pull request #1459 from hughie/patch-7

update rocon_multimaster to 0.5.4
turtlebot_create: 2.1.0-5 in 'hydro/release.yaml' [bloom]
turtlebot_create_desktop: 2.1.0-1 in 'hydro/release.yaml' [bloom]
kobuki_desktop: 0.2.0-1 in 'hydro/release.yaml' [bloom]
added cob_common
Merge pull request #1460 from bit-pirate/bloom-patch-1

turtlebot_create: 2.1.0-5 in 'hydro/release.yaml' [bloom]
Merge pull request #1461 from bit-pirate/bloom-patch-2

turtlebot_create_desktop: 2.1.0-1 in 'hydro/release.yaml' [bloom]
Merge pull request #1462 from bit-pirate/bloom-patch-3

kobuki_desktop: 0.2.0-1 in 'hydro/release.yaml' [bloom]