Release cached files after OpenapiFirst.load

[ahx]

Makes FileLoader and RefResolver classes

after:
                        21.907M memsize (   205.954k retained)
                       236.790k objects (   690.000  retained)
                        50.000  strings (    18.000  retained)
                        
before:
                        20.983M memsize (     1.144M retained)
                       231.069k objects (     8.383k retained)
                        50.000  strings (    50.000  retained)

[ahx]

This removes global file caching, but results in reduced retained memory (if i measured correctly) . Does it just work with your reloading scenario without the need to call clear_cache!, @moberegger ?

[moberegger]

@ahx I'll give it a try. I may have to wait until tomorrow, though. Are you in a hurry to merge this?

[ahx]

@ahx I'll give it a try. I may have to wait until tomorrow, though. Are you in a hurry to merge this?

Not at all. Thank you.