Added support for double entry.
A single transaction can now be reflected in two accounts
Feature: Double entry accounting
Added file for Hungarian translation
Refactoring
Feature: Display account balance in account screen
Improved: Display time & date throughout the app in the device locale
Improved handling of double accounts when editing transactions
Code refactoring
Feature: Nested accounts (arbitrary nesting levels)
Improved: Creating accounts no longer uses a dialog, it has its own screen
Fixed: saving and editing of parent accounts
Improved: Hide the accounts sum bar due to inaccurate summaries. May re-enable in the future
Changed default accounts to match Gnucash desktop (Assets, Income, Expenses, Liabilities, Equity)
Merge branch 'develop'
Added OFX SGML headers export
Started support for double entry in OFX exports
Moved double entry preference to transactions sub section
Fixed: exporting OFX outputs the wrong account type
Commented total account summary code pending better solution for multiple currencies
Code refactoring
Merge branch 'develop' into feature/double_entry