correct spelling of één (one)

In Dutch there is a difference between één (pronounced *ayn* (?), meaning *one*) and een (pronounced *un*, meaning *a*)
Merge pull request #3 from jurre/patch-1

correct spelling of één (one)
Merge pull request #4 from MichMich/master

Comments on basic greetings.
Merge pull request #5 from MichMich/master

Small adjustment + List of Nouns
[README.md] 'Up till' => 'Up to'
[Interaction.md] Add 'Het spijt me'
[Restaurant.md] Add 'Proost'
[Interaction.md] Add 'Tot straks'
Removed space

Having read your blog post about open source (thru David Verwer's iOS Dev Weekly) and being Dutch I thought I'd try to help and find some mistakes in this repo. The extra space was all that I could find, haha!
Merge pull request #6 from siemensikkema/patch-1

Removed space
[Interaction.md] Add basic interactions section
[Interaction.md] Add 'Tot morgen'
Add IrregularVerbs.md
[IrregularVerbs.md] Add 'Hebben'
[IrregularVerbs.md] Add blurb
[README.md] Add IrregularVerbs to Contents
[Interaction.md] Add 'Waar woon je?' & 'Ik woon in...'
[IrregularVerbs.md] Swap English and Dutch columns
[IrregularVerbs.md] Add 'Mogen'
[Interaction.md] Add 'Tot dan' & 'Goedendag'