Merge pull request #347 from mikeubell/master

Distinguish 497 payments from contributions.
add disclaimer about difference in totals displayed by contributions table and daily contibutions chart
Merge branch 'upstream'
Merge pull request #348 from ianaroot/master

faq about contributions table vs cumulative chart
Add independent expenditures.
Merge pull request #332 from mikeubell/IEC

Add independent expenditures.
Add href to recipient.
add IEC FAQ.
Merge pull request #349 from mikeubell/IEC

Add href to recipient.
Add link to FAQ
Merge pull request #350 from mikeubell/IEC

Add link to FAQ
Factor out handling of filer_id. Add more IEC data.