Add raw chainspecs for Westmint and Statemine (paritytech#470)

* add raw chainspecs

* rename chain specs

* add statemine to accepted --chain values

* fix up westmint chainspec

* fix up westmint chainspec

* add token symbol and decimals to statemine chain spec

Co-authored-by: Alexander Popiak <[email protected]>

Add raw chainspecs for Westmint and Statemine (paritytech#470)

* add raw chainspecs

* rename chain specs

* add statemine to accepted --chain values

* fix up westmint chainspec

* fix up westmint chainspec

* add token symbol and decimals to statemine chain spec

Co-authored-by: Alexander Popiak <[email protected]>

Rename cumulus-test-parachain-collator to rococo-collator (paritytech…

…#173)

Ran `find . -type f -name "*" -print0 | xargs -0 sed -i -e "s/cumulus-test-parachain-collator/rococo-collator/g"`