Add option to disable `<Tab>` and `<S-Tab>` or an option to disable all default bindings?

[Heiker]

In theory, if I never remap <Tab> then integration with completion engines should be easier.

This integration should be possible through configuration in the .setup() function. Disabling all defaults should not be a big deal... it's just three more lines of code you'll have to copy/paste from the documentation.

[Shougo]

I think disable all default mappings is better.

[Heiker]

Disable all mappings it is.

[Shougo]

It works!