Less usage of superglobals and isolated load of password and paths into a function + a test of session handling based on __contruct/__destruct

Signed-off-by: emanuele <emanuele45@gmail.com>
Server settings belong to the "outside", not to the importer I think

Signed-off-by: emanuele <emanuele45@gmail.com>
The <general> section (and later something else) of the importer is better replaced with a php script to reduce eval's

Signed-off-by: emanuele <emanuele45@gmail.com>
A couple of more convertion to php of the general section

Signed-off-by: emanuele <emanuele45@gmail.com>
Steps 2 and 3 back to code (to remove step1 from xml) and extracted all the Elk-specific code from Importer (at least the one I was able to find), still around some Wedge-specific

Signed-off-by: emanuele <emanuele45@gmail.com>
Converted the remaining <general> tags to the corresponding class

Signed-off-by: emanuele <emanuele45@gmail.com>