add color_lineage to ColorGroup
make callback in create-color-group action optional
Merge pull request #38 from mark-burnett/track-cg-lineage

Add color_lineage to ColorGroup
Merge pull request #39 from mark-burnett/create-cg-callback-optional

Make callback in create-color-group action optional
CreateColorgroupAction merges data from input tokens

Not merging the input data caused a race condition in cases where there
were multiple input places, but only the token in one of them contained
data for `color_group_size`.
Merge pull request #40 from mark-burnett/fix-create-cg-race-condition

CreateColorgroupAction merges data from input tokens
merge token data in split action
extract get_merged_token method
merge token data in notify action
Merge pull request #41 from mark-burnett/fix-token-data

Fix token data
Quote names of things when constructing dot