Merge pull request #15 from globalresiliencepartnership/pdf-link-fix

add site baseurl to resolve url error
Merge pull request #16 from globalresiliencepartnership/mailfix

adding back email signup to challenge section
Merge pull request #19 from globalresiliencepartnership/budgettemplate

adding challenge budget template
Updated 0003-01-01-challenge.md
Updated 0003-01-01-challenge.md
Updated default.html
Updated 0003-01-01-challenge.md
Updated 0003-01-01-challenge.md
fixing conflicts