* fixed issue with OD pricing for european regions

* made string replacement more readable in getRegionForPricingAPI

* implemented sorting of instance types

* fixed typo in filtering error message

* moved sort to selector.go and refactored FilterVerbose tests

* brought back FilterWithOutput() in selector.go

* working implementation of refactoring solution

* Deprecated the filter methods in selector.go

* added the names of replacement functions to deprecated comments

Co-authored-by: Rodrigo Okamoto <[email protected]>

* fixed issue with OD pricing for european regions

* made string replacement more readable in getRegionForPricingAPI

* implemented sorting of instance types

* fixed typo in filtering error message

* moved sort to selector.go and refactored FilterVerbose tests

* brought back FilterWithOutput() in selector.go

* working implementation of refactoring solution

* added method comments

* converted Filter and FilterVerbose tests to TestGetFilteredOutput tests

* added filtering and output tests

* split filter functions into fetching filtered types and outputing types

* removed OutputInstanceTypes. Output functions only in Outputs.go

* fixed typos and updated function comments

* fixed invalid maxResults check in main

* added error to TruncateResults for negative values

* updated error message for formatting instance types

* reduced the amount of times pricing caches are refreshed

* fixed cache refresh related comments

Co-authored-by: Rodrigo Okamoto <[email protected]>

* updated example code in readme

* updated help printout in readme

* added simple output to choices for output format

* added a drop down for v2.3.1 example code

* fixed v2.3.1 example code

* copied v2.3.1 example code from old readme

Co-authored-by: Rodrigo Okamoto <[email protected]>

* Revert "updated readme (#136)"

This reverts commit 8d513bc.

* Revert "Refactoring of Filter functions (#134)"

This reverts commit fd78895.