Fixed arrow in CADT_CDE diagram
Implementations of chrome.system.cpu, .display, .memory, .network for ios

Closes #346 (pull request)
- Add auto tests for chrome.system.cpu plugin
- Implementation of chrome.system.cpu.getInfo for ios
- Add auto tests for chrome.system.display plugin
- Implementation of chrome.system.display.getInfo for ios
- Add auto tests for chrome.system.memory plugin
- Implementation of chrome.system.memory.getInfo for ios
- Add auto tests for chrome.system.network plugin
- Implementation of chrome.system.network.getNetworkInterfaces for ios
- Change chrome.socket to reuse/depend on implementation in chrome.system.network
Added chrome.identity.getProfileUserInfo.

It returns an email address, but not an id yet; plumbing from native needs to be added to include this.
Correct apparent copy/paste bug
Fix #152 plugins missing repo/issue tracker info
Add auto tests for chrome.system.storage
Update cordova-android to pick up latest gradle fix (fixes #365)
Updated plugin release notes and version numbers for release.
Update version number correctly for chrome.socket
Added -dev suffix to plugin versions
Set version to 0.4.2-rc1
Add fix for NaN versionCode when manifest.version is single digit (fixes #374)
Tweak release instructions to detect never-published plugins
Lower-case chrome.iosSocketsCommon to work around plugman quirk (fixes #379)
Bump version of chrome-app-developer-tool-client to 0.0.3
Lowercase plugin id for chrome.sockets.tcpServer
Updated tcpSockets release notes and version number for release.
Updated iosSocketsCommon release notes and version number for release.
Added -dev suffix to plugin versions
Bump version number for cca-manifest-logic

Also fix some typos in the README