Reorganising include paths to prefer locally installed libraries

index.php:

- initialize $includePath to empty string rather than get_include_path()

- append get_include_path to $includePath after finished string manipulation

If Zend library was installed locally, e.g. `make zend`, OntoWiki homepage
would break on application initialization.

This fix closes issue #102.
niceup include path section
Merge branch 'includepaths' into develop