extract filter from replace

[kristianmandrup]

Please help extract filter from replace (PR not to working, but clearly shows intent)

Currently the code is extremely "poor" and very hard to "grasp" as too much is "bundled together". Please divide and conquer so we can have Single Responsibility. Thanks ;)

PS: I used to do a lot of LiveScript, but been a while...

[kristianmandrup]

Also, please do some documentation of the internal architecture :)

[gkz]

Yeah, might not merge this exact diff, but I should factor this out you're right

[kristianmandrup]

Perhaps you could instead help me on my branch. I did a lot of work on refactoring alrwady