More clean up from PR#66 's comments.
Add request "group_list" to api.
Update ParamsValidator with common params.
Let clients paginate from page number rather than offset.
Add function to generate fake people for tests & hacking.
Standard people_list endpoint returns only basic info. (resolves #38)
AAdd function to generate fake people for tests & hacking.
Add permissions to fake people generated.
Some pep8 clean up.
Add Bio field to people data. (base impl for #39)
Avoid unique constraint violation.
Syntaxes clean-up (including pep8).
Add people list's view.
Add 1rst batch of people profile page.
Split out profile's header page.
Update base profile infos (fixes #39).
Add avatar to fake users.
Auto generate avatar from libravatar (base impl for #33).
Add group view
    + groups listing
    + group details
    + membership listing
Add random memberhsip for fake users.
Try to keep DBSession management in one point location.
Move paging feature to def block.
Update paging option management.
Add status "On vacation"
Add Account activities log.
Add page to people's acitivities (this resolves #69 wrt the people's profile)
Add support for internationalization before
we got too much string to set as to-be-translated
all over the place.
Add 1factor auth (login+password) with basic auth policy.
Add basic ACL against groups admin and modo.
Update config object's usage.