Sccache, needs, CLI update (#277)

* cli is built and sent to examples; cleanup CI

* fix artifact location

* fix script

* 'install' cargo-contract

* save before merge

* GIT_DEPTH and some hackery

* typo

* fix artifacts

* test

* test2

* test3

* build contract from it's repo

* typo

* fix build

* build won't work inside git repo. Install --root ftw

* fix build

* fix build n

* fix artifacts

* cleanup and ready to go

* contract is returned to dockerfile

* cargo install should have not given error when version matches

* comment, anchor

* typo

* less dupes
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