Add more "announce" instructions

Leverage the ASF announce mailing list, and potential custom help
from their press department. Also have the plugin-release and tools-release
process do the same announcements as cadence-release.
Add more detail regarding announce@a.o requests
CB-6941 gnode: Tell people to run npm install when requirements are missing
Added cordova-plugins to plugins list
CB-6651 prepare release branch now updates version in package.json file
updated cadence release doc to reflect auto package.json update
tools-release-process.md: fix things that didn't worktools-release-process.md to fix things that didn't work
Add cordova-pmc-private repo
Tweak usage message for create-verify-archive
Add tweaks for releasing cordova-lib

 - Don't checkout master in the repos before "npm pack"-ing them.
 - Make coho "npm pack" cordova-lib like cli and plugman.
 - Update instructions (partially) to refer to cordova-lib
Closing pull requests

close apache/cordova-plugin-camera#15
close apache/cordova-plugin-camera#34
close apache/cordova-plugin-camera#17
close apache/cordova-plugin-camera#24
close apache/cordova-plugin-camera#23
close apache/cordova-plugin-camera#3
close apache/cordova-plugin-contacts#15
close apache/cordova-plugin-contacts#13
close apache/cordova-plugin-device-motion#4
close apache/cordova-plugin-device-motion#3
close apache/cordova-plugin-device-motion#7
close apache/cordova-plugin-device-orientation#5
close apache/cordova-plugin-device#8
close apache/cordova-plugin-device#11
close apache/cordova-plugin-dialogs#21
close apache/cordova-plugin-dialogs#8
close apache/cordova-plugin-geolocation#6
close apache/cordova-plugin-geolocation#15
close apache/cordova-plugin-geolocation#10
close apache/cordova-plugin-globalization#12
close apache/cordova-plugin-globalization#1
close apache/cordova-plugin-globalization#4
close apache/cordova-plugin-inappbrowser#17
close apache/cordova-plugin-inappbrowser#13
close apache/cordova-plugin-inappbrowser#24
close apache/cordova-plugin-inappbrowser#20
close apache/cordova-plugin-inappbrowser#49
close apache/cordova-plugin-inappbrowser#21
close apache/cordova-plugin-inappbrowser#19
close apache/cordova-plugin-inappbrowser#36
close apache/cordova-plugin-inappbrowser#30
close apache/cordova-plugin-inappbrowser#15
close apache/cordova-plugin-media#2
close apache/cordova-plugin-media#11
close apache/cordova-plugin-media-capture#19
close apache/cordova-plugin-media-capture#15
close apache/cordova-plugin-media-capture#7
close apache/cordova-plugin-media-capture#18
close apache/cordova-plugin-network-information#11
close apache/cordova-plugin-network-information#6
close apache/cordova-plugin-splashscreen#9
close apache/cordova-plugin-vibration#13
close apache/cordova-plugin-vibration#7
close apache/cordova-plugin-statusbar#10
close apache/cordova-plugin-statusbar#5
close apache/cordova-plugins#3
Add links to nvm & nodejs.org to README
If archive verification fails, print a hint about importing keys
Update instructions for shrinkwrap.

Shrinkwrap is only needed for executable tools, not for cordova-lib.
And for the tools it's only needed for release. If an npm-shrinkwrap.json file
exist during development if often causes unexpected behaviors when adding or
modifying dependencies.
Adding cordova-plugin-test-framework repo
Closing pull requests

close apache/cordova-js#73
close apache/cordova-android#105
close apache/cordova-android#81
close apache/cordova-android#82
close apache/cordova-plugin-file#57
close apache/cordova-plugin-file#24
close apache/cordova-plugin-file#3
close apache/cordova-plugin-file#5
close apache/cordova-plugin-inappbrowser#42