Toshaan Bharvani cd6e1ba82d about page update
* remove navbar param
* add aliases for about-us

Signed-off-by: Toshaan Bharvani <toshaan@vantosh.com>
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_index.md about page update
governance.md update governance text for wrapping
missionstatement.md update about pages
ready.md add openpower ready about page and images