rewrite membership warning text
pop up warning when selecting member org
add warning on standalone add membership form
CRM-12452

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* CRM-12452: Cannot record activities for individuals with an apostrophe in their last name
  http://issues.civicrm.org/jira/browse/CRM-12452
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
formatting fixes
Merge pull request #587 from dlobo/FormattingFixes

formatting fixes