rewrite membership warning text
pop up warning when selecting member org
add warning on standalone add membership form
Style changes
minor style changes
clarify help text for fin accts and types
Merge pull request #559 from agh1/2nd-membership-warning

Clarify warning for creating duplicate membership
Merge pull request #582 from agh1/financial-types-message-4.3

clarify help text for financial accounts and types (CRM-12473)
Merge pull request #567 from dlobo/CRM-12452

CRM-12452
Merge pull request #587 from dlobo/FormattingFixes

formatting fixes