* renamed package to log to stop side import requirement
* reverted comment changes
* reverted comment changes
* one more reverting wording back to logger
* wording changes on comments
* Add exchange manager to engine
* Several improvements for engine and friends
1) New file.Exists func
2) gRPC TLS cert expiration date check and regeneration
3) New donation var for use across the codebase
4) Use Go log package until the logger is initialised
* Add cert tests and create dir tree if it doesn't exist for file.Write
* Link up donation address to documentation tool plus minor adjustments
* Fix remaining donation addrs
* Move non-needed reload exchange funcs
* Revert accidental config_example.json changes 🕯️
* Use go logger for logging until the logger has initiliased, otherwise no output will be seen
* Link up portfolio delay val and other fixes
* Run go mod tidy after dependabot PR
* Address nitterinos
* Added Zip archive support
* extended test coverage
* extended test coverage for unzip and zip
* cleaned up Zip() and moved walk to non-exported method increased test coverage
* underscore unused params
* remove unneeded var
* check against correct error and return after
* Errorf
* z -> f
* fixed wording on tests
* handle fine handler close error
* Adds new file.Move func to address a bug with Golang/Docker volumes when using os.Rename
Also uses TempDir for tests instead of live directories and increases test coverage for file.Write
* Goimport the imports
* Make usage of file package name consistent so it no longer clashes with vars
* Remove outputFile if io.Copy fails
