Improve Event log using Sourcery in iOS

potatotips #55: https://potatotips.connpass.com/event/100763/
Sample Project: https://github.com/sgr-ksmt/SourceryDemo

1. Cookpad Inc. 2018.10.09(TUE) potato tips #55 4PVSDFSZΛ࢖ͬͯΠϕϯτϩά࣮૷Λվળͨ͠࿩ 4VHVSV
   ,JTIJNPUP
2. Cookpad Inc. All Rights Reserved. ΠϕϯτϩάΛJ04ΞϓϦʹ࢓ࠐΉ
3. Cookpad Inc. All Rights Reserved. ˞,PNFSDP΋౰ॳ͸͜Μͳײ͡ͰΨϯΨϯ࢓ࠐΉͷΛ༏ઌ͍ͯͨ͠
4. Cookpad Inc. All Rights Reserved.
5. Cookpad Inc. All Rights Reserved. ྑ͘ͳ͍఺ wΠϕϯτ໊΍ύϥϝʔλ໊͕ϋʔυίʔσΟϯάʹͳ͍ͬͯΔ
   wύϥϝʔλ໊ʹඥ෇͚Δܕ͕"OZͳͷͰ࣮࣭ͳΜͰ΋ೖΕΒΕΔ
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6. վળ͍ͯ͘͠
7. Cookpad Inc. All Rights Reserved.
8. Cookpad Inc. All Rights Reserved.
9. Cookpad Inc. All Rights Reserved.
10. Cookpad Inc. All Rights Reserved.
11. Cookpad Inc. All Rights Reserved.
12. Cookpad Inc. All Rights Reserved.
13. Cookpad Inc. All Rights Reserved.
14. Cookpad Inc. All Rights Reserved.
15. Cookpad Inc. All Rights Reserved.
16. Cookpad Inc. All Rights Reserved.
17. Cookpad Inc. All Rights Reserved. 4XJGUΒ͍࣮͠૷ʹͳͬͨ
18. Cookpad Inc. All Rights Reserved. ͔͠͠ɺɺɺ
19. Cookpad Inc. All Rights Reserved.
20. Cookpad Inc. All Rights Reserved. FWFOU/BNFɺQBSBNFUFSTΛຖճ
    ࢥ͍ΛࠐΊͯॻ͘ͷ͸େม☠
21. ࣗಈੜ੒͍ͨ͠…!
22. Cookpad Inc. All Rights Reserved. LS[ZT[UPG[BCMPDLJ4PVSDFSZ Meta-programming for Swift, stop writing boilerplate code.
23. Cookpad Inc. All Rights Reserved. 4PVSDFSZͱ͸ wςϯϓϨʔτΛݩʹɺ4XJGUͷίʔυΛੜ੒͢Δπʔϧ
    wର৅ͱͳΔ4XJGUͷϑΝΠϧΛೖྗ͠ɺςϯϓϨʔτʹଇͬͯੜ੒ ͨ͠ϑΝΠϧΛग़ྗͯ͘͠Ε͏
    wTUFODJMͱݺ͹ΕΔ4XJGUͷͨΊͷςϯϓϨʔτݴޠΛ࢖༻͢Δ
    w3VO
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    w$-*ͰίϚϯυΛXBUDI͢Δͱɺมߋ͕͋Δ౓ʹੜ੒͠௚ͯ͘͠Ε Δ
24. Cookpad Inc. All Rights Reserved.
25. Cookpad Inc. All Rights Reserved. Ϗϧυ։࢝લʹੜ੒͢ΔΑ͏ʹɺ
    
 #VJMEͷ1SFBDUJPOTͰ3VO
    4DSJQUΛఆٛ
26. Cookpad Inc. All Rights Reserved.
27. Cookpad Inc. All Rights Reserved.
28. Cookpad Inc. All Rights Reserved. ·ͱΊ wૉͷ··ͷΠϕϯτϩά࢓ࠐΈʹͪΐͬͱखΛՃ͑Δ͜ͱͰ4XJGUΒ͍͠ ॻ͖ํʹͳͬͯॻ͖΍͘͢ͳΔ
    wҰํɺϘΠϥʔϓϨʔτʹͳΓ͕ͪͳίʔυ͕Ͱͯ͘ΔͷͰɺࣗಈੜ੒Ͱ ͖ΔͷͰ͋Ε͹ࣗಈੜ੒͢Δ
    w4PVSDFSZྑ͍
    wTUFODJMςϯϓϨʔτॻ͘ͷ೉͍͠ʜ
    w݁Ռɺ ,PNFSDPͰ͸ Πϕϯτϩάͷ࢓ࠐΈ͕؅ཧ͠΍͘͢ɺ࢓ࠐΈқ͘ ͳͬͨ
29. Cookpad Inc. All Rights Reserved. ࠓճͷαϯϓϧͷஔ͖৔ॴ IUUQTHJUIVCDPNTHSLTNU4PVSDFSZ%FNP
30. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠