Symbol for `=/=` and change regexp for map/flatMap

Hello,
thank you for your plugin!
I noticed that there is no symbol for Scalaz `=/=` function, so I added it. 
I also changed the regexps for `map` and `flatMap` as follows:
- both of them are now replaced even when followed by `(` or `{`, withouth whitespace in between;
- `flatMap` is now replaced only when the function name matches exactly: previously, functions like `flatMapValues` would be transformed into `⤜Values`.