added load more posts on scroll

[Pervolarakis]

this should fix #30

[narayan954]

Thanks a ton for contributing to the review @mathiasayivor . @Pervolarakis Can you please look into it ?
We crossed the daily limit of firebase because of lack of pagination (didn't expect that to happen) so this issue has to be solved on an urgent basis. Still we can wait for the quota to refresh(must be some hours , around PDT 00:00) so we can have a good look into it. Thanks for the contribution guys

[Pervolarakis]

added the suggested code but cant test it until the daily limit resets... I will push as soon as I have tested it

[mathiasayivor]

Alright.

[mathiasayivor]

The changes in this PR work as expected, but the scroll position resets when there is a new upload.

I have some other suggestions that would make the pagination solution complete (with support for post updates, etc), but would create a new issue since this PR is a priority now.

[narayan954]

Yeah , we'll look into it asap

[narayan954]

@Pervolarakis @mathiasayivor It works! , can you guys please recheck as well ?

[Pervolarakis]

just checked it and seems to work fine

[narayan954]

yeah , just one doubt, I was checking the reads analytics in firebase and it still skyrockets the chart :( . It is possible that someone else is loading the old version .