Crowdfund parachain deposit (#315)

* Initial crowdfund stuff

* Make `communication_for` exit when we end a round (#313)

* Make `communication_for` exit when we end a round

* Fix compilation

* Add file

* Rest of logic.

* Consts to Getters

* Cleanups

* Trying to get things to compile

* More patchwork

* Patch dissolve

* Patch `fix_deploy_data`, add getters to `NewBidder`

* Dispatchable functions compile... with warnings

* Fix some warnings and typos

* Whitespace to Tabs

* Update to use `into_sub_account`

* Add events

* Basic fixes to runtime logic and checking

* Check that auction in progress when creating

* Automatically assign end for crowdfund

* Update runtime/src/crowdfund.rs

Co-Authored-By: Amar Singh <asinghchrony@protonmail.com>

* Update runtime/src/crowdfund.rs

Co-Authored-By: Amar Singh <asinghchrony@protonmail.com>

* Update runtime/src/crowdfund.rs

Co-Authored-By: Amar Singh <asinghchrony@protonmail.com>

* Update crowdfund.rs

* Patch `NewRaise` logic

* Test compiles

* Make `NewRaised` logic even better

* Fix trie id generation, start to add some tests

* More tests

* Add more tests

* Finish tests

* Formatting nits

* Use `into_iter`

* Fix for latest Substrate updates

* Cleanup

* Fixes.

* Copyright header.

* Remove dead code.

* Reinstate actually alive code.

* Fix tests

Still have to write some new follow up tests though

* Make funds work before auction

* Test a fund which spans 2 auctions.

* Docs.

* Update doc
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