[CB-5223] Downloading should be Installing -- sometimes it isn't downloa...

[jsoref]

...ding

[agrieve]

Sometimes it is downloading, so I think it's good to say so.
Perhaps the best fix here is to print "downloading" only when about to download, and then print "installing" upon calling bin/create on the platform.

[jsoref]

With changes, here is some output to consider:

Not Cached (verbose)

Requesting {"uri":"https://git-wip-us.apache.org/repos/asf?p=cordova-firefoxos.git;a=snapshot;h=3.2.0;sf=tgz"}...
Downloading cordova library for firefoxos...
Downloaded, unzipped and extracted 7348319 byte response.
Download complete
Installing cordova library for firefoxos...
Checking if platform "firefoxos" passes minimum requirements...
Creating firefoxos project...
Running bin/create for platform "firefoxos" with command: ""/Users/jsoref/.cordova/lib/firefoxos/cordova/3.2.0/bin/create"  "/private/tmp/hello/platforms/firefoxos" "io.cordova.hellocordova" "HelloCordova"" (output to follow)
Creating Firefox OS project
Project Path platforms/firefoxos
Package Name io.cordova.hellocordova
Project Name HelloCordova

cordova library for "firefoxos" already exists. No need to download. Continuing.
Generating config.xml from defaults for platform "firefoxos"
Calling plugman.prepare for platform "firefoxos"
Preparing firefoxos project
Processing configuration changes for plugins.
Iterating over installed plugins: []
Writing out cordova_plugins.js...

Cached (verbose)

cordova library for "firefoxos" already exists. No need to download. Continuing.
Checking if platform "firefoxos" passes minimum requirements...
Creating firefoxos project...
Running bin/create for platform "firefoxos" with command: ""/Users/jsoref/.cordova/lib/firefoxos/cordova/3.2.0/bin/create"  "/private/tmp/hello/platforms/firefoxos" "io.cordova.hellocordova" "HelloCordova"" (output to follow)
Creating Firefox OS project
Project Path platforms/firefoxos
Package Name io.cordova.hellocordova
Project Name HelloCordova

cordova library for "firefoxos" already exists. No need to download. Continuing.
Generating config.xml from defaults for platform "firefoxos"
Calling plugman.prepare for platform "firefoxos"
Preparing firefoxos project
Processing configuration changes for plugins.
Iterating over installed plugins: []
Writing out cordova_plugins.js...

Not Cached

Creating firefoxos project...
Generating config.xml from defaults for platform "firefoxos"
Preparing firefoxos project

Is this what you'd want? If so, I can squish them together...

[agrieve]

LGTM! I'll squish when merging.

[agrieve]

Merged! Thanks!

Please close the pull request.