Minor typos and grammatical erros in the docs.

[nadershamma]

Hi
There are some very slight errors on the frequently-asked-questions/who-is-taiga-for page.

We re obsessed with usability

should be;

We're obsessed with usability

Next.

to manage our own projects. But

The word "but" should not be at the start of a sentence.

project management tool, or

The word "or" should not be proceeded by a comma.

May I correct these tiny errors and issue a pull request?

[migonzalvar]

Thank you, solved now in master