When used with multiple watch paths block vars are improperly assigned about filewatcher

[AlexWayfer]

• Tests fixed
• Bug with permanent deleted event fixed
• Tests supplemented

You can track the fight between me and Travis CI in #76 now.

[ngzax]

I have verified that this is now working properly. Thanks for the quick fix.

[AlexWayfer]

Hello!

You're absolutely right. I'm sorry, I'll try to fix this soon (and cover by tests).

[ngzax]

No worries! Just thought you'd like to know. Thanks for providing this gem, it's nice and lightweight. I am using it for one of my projects, https://github.com/ngzax/urbit-sync

[AlexWayfer]

@ngzax, some news:

• changes argument instead of fn, en should be, it's correct for now
• README is incorrect about this
• But I decided to throw every option to Ruby API, and calling block with filename, event arguments (calling multiple times with every option), almost like in the README now
• README is fixed (on my local), I'm fixing (and completing) tests

Stay tuned 👌