refactor(xml): replace sax parser by jsoup

Close #80
style(list): add some margin to make list clearer

Relative to #81
style(about): add version in about section and minor changes
style(map): change the location button style

Button has round borders & does not have the stock style anymore
Add some margin

Relative to #81
feat(list): click on a station should display more info

An activity is opened with the station info (name, address, bikes, ...)
Upgrade to droidparts:2.6.2

Close #86
chore: upgrade android support version

Relatie to #81
style(launcher): update app launcher icon

Relative to #81