Resolve "update model application tegel example"

Closes #9

See merge request urbanoikos/models/cca!10

Resolve "first steps Colab notebook not update"

Closes #10

See merge request urbanoikos/models/cca!11

Resolve "More formal documentation"

Closes #8

See merge request urbanoikos/models/cca!9

consistent usability of to_df()

according to google style guide

Resolve "more accessible way to change mean of transport"

Closes #7

See merge request urbanoikos/models/cca!8

added kwarg to cca_to_df
changed materialinfo vehicel names to unique ones

Resolve "str to  literal and other minor code consistency cleann-ups"

Closes #5

See merge request urbanoikos/models/cca!5

Resolve "format existing code"

Closes #6

See merge request urbanoikos/models/cca!6

Resolve "Use specific tag in the first steps manual"

Closes #3

See merge request urbanoikos/models/cca!3

Resolve "Update first steps colab"

Closes #1

See merge request urbanoikos/models/cca!2

First complete version

See merge request urbanoikos/cca!1