v0.5.5

Observables v0.5.5

Diff since v0.5.4

Merged pull requests:

• Fix a typo (#103) (@fingolfin)
• fix custom obsfuncs + add back obs.inputs (#105) (@SimonDanisch)
• Add priority to map (#110) (@ffreyer)
• Get an actualy unique ID (#111) (@SimonDanisch)