Updated link to CCA toolchain.
Merge pull request #194 from pearlchen/master

Updated link to CCA toolchain.
[SystemInfo API] Update chrome.system.cpu API usage.
Merge pull request #195 from hokein/update_cpu_api_usage

[SystemInfo] Added CPU features and processor usage.
[systemInfo] Cleaned html
[systemInfo] Bumped manifest version and updated webstore assets
Merge remote-tracking branch 'upstream/master'