Changed texarea to pre

Done.
Added link to gratipay in Readme.
Merge pull request #2937 from gratipay/securitypage

Changed texarea to pre
Formatting changes

Made the page look slightly cleaner.
Fix #2940
Fix #2942
Merge pull request #2943 from gratipay/sign-out-tweaks

sign out tweaks
Merge pull request #2939 from gratipay/securitypage

Formatting changes
update i18n files
Bump version to 1737
Rough first cut
Start fixing header and footer
Start cleaning up nav
About pages starting to look not too shabby!
Fix Community pages
Catch up about pages with moving target
Rough hew new profiles
Roughly fix the call to action
Start using Chronicle for body text

Statements and about pages
Fix font on tip distribution chart