the get scenario produce all the get available for each instances in the site

Adapted to the new LodelContext

Only run steps if count > 0

Added a sleep 1 between each background process starts.

deleted trailing ',' from multivalue values

Addapted to links withou _blank target

Tree 'scenario' are available :
- mass insertion
- mass edition
- mass deletion
For the moment scenario parameters and order are harcoded :
- 50 iteration for mass_insertion
- 10 iteration for mass_edition
- 10 iteration on deletion

SLIM is now able to edit configuration from CLI, to start instances etc.

Allows runtest to run again =)

Nescessary for refs #145

- Add an update feature to create_instance.sh script
- Updated webui plugin load instruction (running loader.start() in run)
- Updated the way EmCmponents handles EmGroup
- Updated the way EmFields handles EmClass
- Updated xmlfile translator according to EmComponent modification

now using examples/em_test.pickle as editorial model for new instances

- adds tests on filter parse & check
 - standart filters parse & check
 - relational filters parse & check
- bugfixes related to tests in query.py
- update the example and the test EM
- bugfixes in admin script

- create_instance.sh create some symbolic links
- webui plugin that add webui configuration variable