Refactorings and fix file-size-sort sorting by cell rather than row (#98

)

* Move dataattributes function out of make column sortable

* Move sortfilezize, sortdates, sortruntime out of makecolumnsortable so not defined multiple times.

* Move getTableData out of make each column sortable.

* Move updateTable out of makeeachcolumn sortable.

* Move getColumn function definition onto column object.

* Move updateTable stuff related to fileSize into its own function to be less confusing.

* WIP: fix file-size-sort useing innerhtml.

* WIP 2: fix file-size-sort useing innerhtml.

* Fixed file-size-sort sorting cells rather than rows.

* Remove remember sort from declared for each column.