Put exercises into a logical order

[mbertheau]

I tried to come up with a logical order of exercises. This is what I ended up with.

I changed the order on https://github.com/exercism/xracket/wiki/Order-of-exercises as well to reflect.

[arguello]

Looks good - thanks!

@yurrriq - what do you think?

[yurrriq]

Maybe swap rna-transcription and anagram so hamming and rna-transcription are back-to-back. Otherwise it's hard to argue with the logic here. I like the categorizing in the wiki.

[mbertheau]

I put anagram between the two for students that grew tired of dna and rna. I can see however how passion goes both ways :)

@arguello - your call :)

[yurrriq]

"If it ain't broke, don't fix it." LGTM

[arguello]

cool

[wobh]

Two resources I find myself referring to often:

• all exercises implemented by language: http://synopsis.exercism.io
• all exercise readme's: https://github.com/exercism/x-common

I've been wondering about organizing exercises into one or more trees by themes, topics, and maybe even characters, situations, or subjects.

[kytrinyx]

@wobh did I link you to this discussion? exercism/problem-specifications#63

[kytrinyx]

Also worth noting: there's a "todo" keyword in the problems api: http://x.exercism.io/tracks/racket