imports and typos for examples

[martijnhoekstra]

[pchlupacek]

@AdamChlupacek could you please review this with your recent changes to 0.3 release, so we can get this in ? Thanks

[AdamChlupacek]

@pchlupacek looks good to me, I am ok with merging this

[AdamChlupacek]

Hmm I changed the destination for this to the 0.3 series and seems we have a conflict :/ Anyhow I will proceed with publishing 0.3 as this is only doc and can be merged later.