Update gitignore
Metric units
Add plus sign if temperature is not negative
Add mps to wind speed output
Remove unused
Use boost::optional in class Result
Add degree celsius
Remove ViewController class
Add weather tab (iphone)
Add icons for tab "about"
Add bar items images (iphone)
Add openweathermap.org icons
Add custom weather tab class
Collect icons
iPad storyboard auto-update
Hols some space for text label
Add tabs weather and about (iphone)
Update icons
Change storyboard image
Add empty.png icon