Harbor layer URL replaced

Development URL replaced by the URL used in the live
system.
Add .gitignore file

* Ignore *.swp files
Separate harbour layer from tidal scale layer

The features for harbours and gauges have been painted on the same
layer (layer_pois). To get the permalink working for gauges, an
own layer had to be implemented for these features.

Fixes #11
Layer tidal scale hidden by default

The layer tidal scale should be hidden by default.
Convert to unix file format

This repository had files with different file formats. All source code
files (css, inc, js, php) are now in unix file format.

There are no content changes. You can verify this by calling Git
diff views with the parameter '-w' (ignore whitespace).
Harmonise indentation

This repository had files with different indentations. All source code
files (css, inc, js, php) have now a indentation of 4 spaces (not
tabs) and trailing whitespaces have been removed.

There are no content changes. You can verify this by calling Git
diff views with the parameter '-w' (ignore whitespace).