accept proposals in mandarin and malay
Merge pull request #18 from awguild/languages

Languages
fix typo
remove spanish from proposal splash page
Merge pull request #19 from awguild/languages

Languages
show unpersisted prices on the conference pricing page [fixes #68597972]
order countries by name [fixes #60505560]
make payment amount a decimal [fixes #59635712]
add interface to delete discounts [fixes #58929582]

- remove some controller duplication
- authorize all actions
style discount remove button
Merge pull request #20 from awguild/staging

Staging