3 First of all: thanks for contributing!
7 * Always specify zoom levels as either >= or < . Don't use = or =< or >
8 * Open curly braces on the same line, and close on an empty line.
9 * Two space indents. No tabs.
10 * space after : but no before
14 * commits must be atomic: just one consistent change per commit
15 * when possible, refer to an issue on the commit message, for example adding
16 `(cf #xx)` at the end of the commit message
17 * never commit environment related changes (like layer file path or database
18 connection settings in the .yml)
20 ## Submitting a pull request
22 * when it makes sense, add two screenshots before/after to hightlight the changes
23 * keep pull request as simple as possible