Merge branch 'master' of https://github.com/nansencenter/nansat
Fixed wrong reference to calibration constant in ASAR mapper
Nansat 0.5
Merge branch 'develop'
added asar doppler mapper and updated nansat.py to sort the mapper list so that a default is always selected when several mappers can handle the same data
made package directory nansat under project directory nansat in order to follow the packaging conventions
moved setting of env variables to __init__.py instead of nansat.py, and corrected small error when sorting mapperList
added tests and corrected bugs found in several mappers
changed to import .nansat_tools in __init__.py
Use extension module for compiling pixel functions
#72: Merge with neothemachine. Extend setup.py for CL compiler(windows).
#72 Extend setup.py for windows. Minor change for nansat.__init__().
#72 imoprt os in setup.py for windows.
updated package information in setup.py and added requirements (checks for numpy, gdal, and basemap, installs scipy, matplotlib, Pillow)
moved tests-package inside nansat-package
#74 clean up __init__.py
#74 celan up nansat_tools.py: move Node to separate file
#74 clean up nansat_tools.py: move PointBrowser to a separate file
#74 clean up NSR
#74 tutorial works