Template which rounds it's argument the closest even integer.
{{RoundToEven|0.4}}: 0
{{RoundToEven|0.5}}: 0
{{RoundToEven|0.6}}: 1
{{RoundToEven|1}}: 1
{{RoundToEven|1.4}}: 1
{{RoundToEven|1.5}}: 2
{{RoundToEven|1.6}}: 2
{{RoundToEven|2}}: 2
{{RoundToEven|2.4}}: 2
{{RoundToEven|2.5}}: 2
{{RoundToEven|2.6}}: {{RoundToEven|2.6}
{{RoundToEven|3}}: 3
{{RoundToEven|3.4}}: 3
{{RoundToEven|3.5}}: 4
{{RoundToEven|3.6}}: 4
{{RoundToEven|4}}: 4