Merged in develop (pull request #1)

Allow transfer between envelopes. closes #9
Correct name of envelope transfer transactions (name should reflect envelope to or from) and test.
Set default transaction ordering to entry_date, id (to maintain order within a day's transactions)
Fix tests. View transaction attachment via link, rather than iframe embed. Add simplecov
merge master
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Style small tag. Remove iframe styling.
Allow transfer between accounts. closes #10
Start envelope filling. Issue #27
Change all currency input fields to numeric with penny step.
Start client-side distribution calculations
Finish client-side logic for envelope distribution.
Controller logic and tests for envelope filling. closes #27
Save current envelope fill data as budget. closes #24
Merge branch 'develop'
Add button for envelope fill and changed button styles
Add links to filter transactions by envelope or account from transaction view. Issue #48
Display running balance of account of envelope in filtered transacton view. closes #48
Prevent NaN display when no income envelop selected in fill envelopes view. closes #18
Add memo field to import method. closes #53