Fixed sorting method. Now sorts by date then ref number.
Code now updates the old ref numbers into their new equivalents
Minor fixes.
Added inserting of sum row after every transaction group. Not finished; very wordy.
Removed outdated method.
Quick Fixes
sum_trans_group now returns the sum
Quick fix of sum so that it's the inverse of the group total.
Added initial version of write_bank_trans and some minor fixes.
A few more minor formatting fixes. Basic concept works.
Fixed the empty dimensions bug.
Added date component to write_dimensions method
Houskeeping + updated Readme