Add <plugins> tag to config.xml, containing a list of plugins.

Example:
<plugins>
  <plugin id="org.apache.cordova.file" version="0.2.5" />
  <plugin id="org.apache.cordova.file-transfer" version="0.3.4" />
</plugins>
Revert "Add <plugins> tag to config.xml, containing a list of plugins."

This reverts commit 7259921ceeededb6a280916c6898bc28a0a972ae.

We have decided that this approach is a mistake, and are pursuing an
alternative implementation. Code for that will follow.
Write plugin metadata (ID and version) into cordova_plugins.js

This new data is attached to the exported array as the key `metadata`.
It's an object whose keys are IDs and values are version strings.
CB-5367 reject non-whitelisted org.apache.cordova plugins
CB-5238 adding custom frameworks
bumping xcode version
CB-5238 fixing typo and updating tests
Added amazon-fireos platform.
Updated amazon-fireos.spec with amazon-fireos platform name.
Corrected project names for android_one and android_two.
Modified README.md for Cordova-AmazonWebView-Plugman
CB-5584 Fix git clone of not working on windows.

Suspect the issue was setting CWD to a tmp path before its created.
Based on pull request: https://github.com/apache/cordova-plugman/pull/16
CB-5034 document registry functions in plugman
added battery-status + device-motion to whitelist
add ubuntu platform
updated to 0.16.0
CB-5619 Avoid Error: Error ...

Prevent errors like the following:
[Error: Error fetching plugin: Error: error: Could not fetch package information for imaginary.plugin]

https://github.com/apache/cordova-plugman/pull/39
CB-5579 Add support for --www param for install, uninstall, prepare commands.

From pull request: https://github.com/apache/cordova-plugman/pull/37
Merge branch 'fireos'
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-plugman
updated version to 0.17.0
CB-5495, CB=5568 fix config.xml path for ios