v0.15.0

DynamicGrids v0.15.0

Diff since v0.14.1

Merged pull requests:

• tune and test performance optimisations (#106) (@rafaqz)
• refactor image outputs (#107) (@rafaqz)
• improve docs and refactor redundant objects/methods (#108) (@rafaqz)
• test and document custom object grids (#109) (@rafaqz)