Fixed column order

[duckbrain]

Resolves #429

Adds a colNames function that returns a []string sorted. This allows the column names to be modified before being strung together, while ensuring that weird quirks don't cause them to be sorted in a different way. For example: "a" < "a_" < "a``"

[stanislas-m]

@duckbrain Thanks! Can I ask you to rebase your branch on development? All changes must go to development first, then we cherry-pick to master the bugfixes.

[duckbrain]

My bad. Not sure why GitHub decided to close it when I pushed, but I rebased it and reopened.

Curiosity question: Do master and development ever get merged? Doing a real rebase caused a lot of merge conflicts unrelated to my changes, so I reset --hard to development and cherry-picked my changes. I think that should be effectively the same.

[stanislas-m]

Thanks!

Curiosity question: Do master and development ever get merged? Doing a real rebase caused a lot of merge conflicts unrelated to my changes, so I reset --hard to development and cherry-picked my changes. I think that should be effectively the same.

development gets merged into master on every minor release. Maybe something went wrong when I changed the base branch on your PR? :)