Adding and formatting documentation for Sphinx.

Adding and formatting documentation for Sphinx.
Renaming folder senslab under /testbeds into iotlab. Changing bash_testsuite according to new naming convention.
Cleaning files and replacing slab stuff by iotlab.
Patching sliver_status
Correcting missing bracket.
Changing iotlabpostgres to remove global variable iotlab_dbsession and to put a singleton instead.
Removing useless prints and correcting attribute in api.
further fixes.
Moving update_jobs_in_iotlabdb in iotlabpostgres.py.
Removing now useless attribute db in iotlabdriver.
Changing name of create_engine in iotlabpostgres to create_iotlab_engine.
Adding forgotten import in importer.
Cleaning and commenting mostly.
Adding a new class in OARrestapi.py to put together all the parsing functions used for a GET_resources_full.
Fixing bug in DeleteLeases.
Documenting, cleaning.
More cleaning and documenting.
fixing getslices (sfi show node_ids was empty when done on a slice) and fixing create lease broken return Rspec.
Correcting fill_record_info to add information on nodes.
Modifying the test script (is now a python script).
Fixing LdapSearch, as it appears that not all the entries in LDAP have first_name and last_name assigned, which failed (user is not found but no error raised whatsoever) when using a (cn=first_name last_name) when looking for a specific user.
Fixing test script.
Fixing yet another problem with GetSlices (slice returned is empty if of all the current leases none belong tto the slice we are looking for).