another handful of SDK 2.0 changes (also remove build products and ignore in future)
Merge remote-tracking branch 'natevw/master' - THANKS Mate!
Compile on BETA5 - some refactoring to simplify things

 - removed httppebble (not needed with SDK2)
 - commented out all networking to work on UI
 - got rid of util.c: included only itoa, replaced by snprintf in sdk2
 - got rid of time_layer, it did not do more than a text_layer
 - transformed weather_layer into a real layer subclass
 -- create the bitmap_layer at startup and keep it
 -- use snprintf to format the temperature instead of complicated memmove
Finalized futura weather with sdk2

 - Use weather webservice from openweathermap.org
 - Simple JS/C interaction with a 15 minutes refresh
 - Simple and incomplete mapping of weather conditions to icons. Needs some more work.
Avoid using bitmap_layer_get_bitmap because it is not included in SDK beta4
always display two digits for minutes
fix memory leak on fonts
Small but important improvements

 - Update screen when starting (do not wait for the first second)
 - Use clock_copy_time_string() to simplify time formatting
 - Do not update the entire UI every second, look at the units_changed
Merge pull request #2 from sarfata/master

Port of futura weather for SDK 2.0