Improved Dutch translation

Translate new strings (except for currenties)
Fix some typos
Account should be translated as 'rekening' instead of 'dagboek'
In double-entry accounting, all transactions should have a double-entry. If the transaction is a credit, then the double-entry is a debit and vice versa. Also, the transaction amount is positive or negative depending on if the account the transaction is in is a debit account or a credit account. Example: If you create a salary transaction in the income account, that should be a credit which is a positive number. If the double-entry account is the checking account, that is a debit account so it's entry should also be a positive number.
Merge pull request #149 from jesseshieh/js/double-entry-debit-credit-fix

Double-entry accounting positive and negative debits and credits
Greek translation update
Improved German translation
Merge pull request #152 from stovocor/develop

Improved German translation
- Fixed: Editing account modifies the transaction type of transfer transactions - fixes #145
- Fixed: Bug causing double entry transactions not to be considered equal
- Fixed: Computation of account balance did not properly consider double entries
- Improved: Double entry accounting is now activated by default
- Improved: Restricted parent/child account hierarchies relationships to those defined by GnuCash accounting
(see: http://code.gnucash.org/docs/C/gnucash-help/acct-types.html )
Some code refactoring
Replacing Gnucash with GnuCash
Fixed small typos
Android Studio gets error if same string is defined more than once

Introduced in commit 3616eff03f81de2b1ff271de810388f446bcde0e
Merge pull request #155 from aerkefiende/greektranslation

Remove duplicate string from Greek translation
Merge pull request #153 from aerkefiende/germantranslation

Updated German translation
An improve french translation
close cursors
More db resource leaks
More resource leaks. One zh translation error.
Merge pull request #160 from fefe982/develop

Fixed some db resource leaks
Fixed: Wrong caption for export dialog.
Updated version numbers for next minor release (1.3.2-beta2)
Merge branch 'develop' of https://github.com/codinguser/gnucash-android into develop