New demo notebooks for Houseprint and (future) use of Tmpo.
Add configuration module

The configuration module allows to extract configuration
alike things from the code (e.g. the IP of the opengrid server,
the path to store data). An example configuration file and a notebook
demonstrating the use of the configuration module are also provided.
Cleaning up the nighttime standby electricity consumption script
First version of a gas analysis script, to be developed.  See also discussion in #19
More explicit reference to opengrid.cfg files for passwords to avoid accidental filling in of passwords in the config.py
Merge branch 'configuration' into develop
Trying to commit file updates for fluksoapi, cfg.example, water & gas consumption (4 files) 
this time with TortoiseSVN  instead of WinGit,
Added some features to "gas" notebook.
Updated wunderground script to work with the opengrid.config
Addition of some work in progress (WIP) scripts, such as (in order of importance/completion):

wunderground fetch script (OGRE - Wunderground _v0.2.ipynb)
Water analysis (WIP OGRE - Piecharts_water_v0.6.ipynb)
Carpet plot analysis (WIP OGRE - CarpetPlots_v0.1.ipynb)
Color chosing based on name or number (WIP colorfester.ipynb)
Interactive plotting in a ipython notebook (WIP  d3_example.ipynb)

Feel free to comment/test these and give feedback!
4 new water analysis scripts
One subfunction has an issue though 
( well documented in notebook & I will open ticket), but is currently temp-solved with a dirty quick-fix)
Committing these WIP scripts to the right branch.
(Finally starting to understand SVN / Git a bit!)
updated wunderground script and made it more generally usefull (not just temperature)
Enhanced Demo_WaterGasElekVisualisation with date range selection (for faster Demo/tests) with smaller datasets.
Todo: Add resampling.
Remove results from 3E because they bias the standby consumption box plots
Synchronize data now uses the config file for the path_to_data #20
Cleared output of notebook and minor change in Gas.ipynb.  This is becoming redundant with the Demo_WaterGasElekVisualisation.ipynb script
Small bugfixes, mainly due to missing import or use of divide instead of np.divide etc.
- Renamed wunderground development notebook.
- Minor bugfixes linked to missing imports and use of dt as datetime
Small changes in the fetch_current_conditions function:
- no capitals for functions or methods
- change key in apikey for clarity
- added example of how to create dataframe, but I don't think this function needs to return a df
- propose to return time as POSIX timestamp
Removing files that are developed in other branches