Rename water_balance to swb (fixes #14)
Merge
Rename water_balance to swb in CHANGES.txt (additional fix for #14)
Add point extraction from raster

Two functions were added to help extracting point information from
raster files.
Fix documentation formatting error
Add Timeseries.__repr__()
Take tzinfo into account when indexing Timeseries

A Timeseries object can now be timezone-aware. When an aware Timeseries
object is indexed with an aware datetime object, the time zones are
now taken into account. This bug was causing malfunctioning in
spatialize.
Merge branch 'master' into 0.10
Version 0.10a12