backup options

[buggyj]

Support for various backup schemes, for instance as mentioned in #3. Maybe presented as a set of tabs. Different schemes could have different paths for the root backup dir.

[buggyj]

The storage will need to reorganized - the current scheme is

{backup:false,periodchoice:"day",period:[],backupdir:"backupdir",backedup:{}}

With the storage api each key can be retrived separately - so the current keys are backup,periodchoice,period,backupdir,backedup

we could have backup - enables backup choices - array of user selections (which backup schemes to use) with each possible choices having keys:

• option[choice]: - {backupdir:pathstring ,key1: , key2:, etc}

eg assume current scheme is option 1 backup:boolean, choices:boolean array, option[1]:{periodchoice:periodstring,period:datesArray,backupdir:backupdirstring,backedup:{tiddlywikispaths}}