Distinguish NativeScript CLI output from other (CocoaPods) outputs

[vchimev]

For example, CocoaPods outputs a message when a new version is available on each pod command which is confusing as it appears that NativeScript CLI warns for the new version of CocoaPods and suggests to update. The discrepancy here (in the log below) is that the NativeScript CLI output contains information about the new CocoaPods version which is not supported yet (#1611).

mcsofvchimev:master vchimev$ node_modules/.bin/tns doctor
Verifying CocoaPods. This may take more than a minute, please be patient.
  ◜ Installing iOS runtime.tns-ios@1.7.0 ../../../../var/folders/8k/ccv181q10z18k09cv2jgf9y929jlc5/T/nativescript-check-cocoapods11636-4171-fjen81/node_modules/tns-ios
  ◠ Verifying CocoaPods. This may take some time, please be patient.Updating local specs repositories
  ◝ Verifying CocoaPods. This may take some time, please be patient..
CocoaPods 1.0.0.beta.6 is available.
To update use: `gem install cocoapods --pre`
[!] This is a test version we'd love you to try.

For more information see http://blog.cocoapods.org
and the CHANGELOG for this version http://git.io/BaH8pQ.

Analyzing dependencies
  ◜ Verifying CocoaPods. This may take some time, please be patient.Downloading dependencies
Installing AFNetworking (1.3.4)
Generating Pods project
  ◜ Verifying CocoaPods. This may take some time, please be patient.Integrating client project

[!] Please close any current Xcode sessions and use `__PROJECT_NAME__.xcworkspace` for this project from now on.
  ◠ Verifying CocoaPods. This may take some time, please be patient.Sending stats
  ◞ Verifying CocoaPods. This may take some time, please be patient.Pod installation complete! There is 1 dependency from the Podfile and 1 total pod installed.
  ◡ Verifying CocoaPods. This may take some time, please be patient..
No issues were detected.

[vchimev]

Here is a screenshot of the console output of the Groceries app built with NativeScript CLI 2.0.1.

The output of CocoaPod is colored in dark green. The warnings are shown as warnings in yellow.