use the Boku signup URL from settings
Reword the info request template slightly

Reviewers sometimes don't make it clear in the comments what to do with the email we send them.
Catch up on AMO table removals (bug 999119)
Allow admins to remove all tags (bug 1012649)

clean_tags already return an empty set when there are no tags,
so that `if` was preventing us from removing all tags from the
the addon.
Merge pull request #2075 from robhudson/migrations

Catch up on AMO table removals (bug 999119)
space after comment
Merge pull request #2080 from andymckay/fix-migrations-2

space after comment
Remove PayPal related code (bug 1012886)
Commit from Mozilla Verbatim by user ibai@oihanguren.com.: 890 of 3763 strings translated (26 fuzzy).
bump(raven): 4.2.3
Merge pull request #2077 from washort/1012886

Remove AMO PayPal code (bug 1012886)
oops missed one
Extract/compile script.  Today's lucky number is 6345.
upgrade dennis to 0.4.2
Merge pull request #2050 from mstriemer/update-boku-signup-docs-url

use the Boku signup URL from settings
Commit from Mozilla Verbatim by user m.araldi.: 3763 of 3763 strings translated (0 fuzzy).
add in altpay (bug 1011122)
Merge pull request #2081 from andymckay/1011122

add in altpay to load prices
Commit from Mozilla Verbatim by user michael.koehler1@gmx.de.: 2492 of 2492 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user markh@babelzilla.org.: 2492 of 2492 strings translated (0 fuzzy).