#97 error handling for bosh.initSettings is flawed

[Myk Taylor]

error handling for bosh.initSettings attempts to offer recovery options if BashSettings.dat and/or BashSettings.dat.bak cannot be read, but it suffers from a few deficiencies:
1) if a problem is detected, it attempts to show a messagebox, but wx.App has not been initialized by that point and the call fails
2) it does not catch ValueErrors, which are the errors actually thrown when there is a format mismatch
3) it does not do similar recovery actions for Table.dat/Table.dat.bak, meaning that even if BashSettings.dat is deleted, the program still would not start due to Table.dat being in the wrong format

[Myk Taylor]

ValueError will likely no longer be thrown due to r1513, but the other problems still apply

[Myk Taylor]

To solve the first point, I think we need to refactor our initialization:
1) move module-level functional calls into classes or into main() so we can't fail before we enter main
2) initialize wx before anything else
3) display all startup errors graphically

[Mr_and_Mrs_D]

MOVED TO GITHUB: https://github.com/wrye-bash/wrye-bash/issues/178