starting layers editor
save layers data
add colorPicker component
add colorPicker and tags widget to layers editor
refactor tags stylesheet
improve tags component
improve colorPicker component
add `$.setComponentValue([name], value)` function
improve layers editor
improve layers editor layout + fixes
add specs
remove unused files
fix layers editor issues
add `sortable` javascript component
save layer position
fix toggle button
apply css filter to map tiles
update meppit-map-rails to 0.2.0
add layers panel to map page
update `map_options` helper specs