Fix errors and tweak verbiage.
Fix errors and tweak verbiage.

* Branding is somewhat arbitrary. I still think of our company as Stack Exchange.
* Rephrase a bit to emphasize how many people were helped by their questions.
* OPs "accept", they don't "select" answers.
* Clarify what anonymous score means.
* The community team hasn't been able to scale as fast as the community in quite sometime.
* A few sites still have the old profiles. (Hat tip: [tpg2114 ](https://blog.stackoverflow.com/2016/01/year-in-review-2015/#comment-2454778820).)
* Omit needless words.
* I didn't mean to insult our designers. :-/
* I forgot about Wikipedia. (Hat tip: http://skeptics.stackexchange.com/users/7654/franck-dernoncourt)
* Missing "of". (Hat tip: [Infinite Recursion](http://chat.meta.stackexchange.com/transcript/message/4444696#4444696).)
* My DBA joke doesn't work.
StackExchange/stack-blog,jericson/stack-blog,StackExchange/blog,dgrtwo/stack-blog,jericson/stack-blog,StackExchange/stack-blog,dgrtwo/stack-blog,jericson/stack-blog,StackExchange/stack-blog,dgrtwo/stack-blog,StackExchange/blog,StackExchange/stack-blog,StackExchange/stack-blog,jericson/stack-blog,StackExchange/blog,dgrtwo/stack-blog,StackExchange/blog,jericson/stack-blog,dgrtwo/stack-blog,StackExchange/blog