Reorganized services so you can load and write the same file

[gnat42]

The previous services were nicely decoupled however because they were
writers were created with blank excel objects, not the object in the
main service being utilized. This way provides a service that can load
files modify them and then output them in multiple formats

This fixes both open issues you currently have #43 and #36

The real issue was that your original services uses the factory method and passes it the 'service' of a blank php excel object.

[liuggio]

great! Is introducing a sort of BC?
Could you modify the documentation as well?

[gnat42]

Well it basically removes all of your original services, so anything using the factories or load services are gone. Everything goes through the one service class now. Its somewhat less 'configurable' but allows you to do more. Which is why it replaces your ExcelContainer class with a new class, even though much of the 'API' would be very similar.

I also modified the documentation to match how it should be used. Because this is such a break I wasn't sure how you should merge it. It may be good to be its own newer version so that a composer update doesn't break anyone's code. I'm not really sure the best way. Merging this could potentially break people's projects for sure.

[hectorh30]

Works to edit an Excel file 👍

[liuggio]

Version v2 has started :)

[liuggio]

thanks @gnat42

[liuggio]

@gnat42 I reverted your PR, please have a look to the new Factory, WDYT?

[gnat42]

The factory looks great, only feedback I'd have is to check the 2nd parameter to createWriter.

[liuggio]

good idea the only thing is that the variable in Excel repo is private and hardcoding and duplicating the array is not a great option. Could be great to ask in the repo if they'd like to public the list of the types.