[IMP] Add statement line reference to search

Add the reference to the search for matching statements. When importing CAMT (Dutch banking files) the description of the invoice is filled in the reference field. The name field only has the index (eg 001), not the full text.
[FIX] conversion_dict is now created in the generic parser
replace unicode by ustr
import ustr from tools
[FIX] correct partner used in statement import for refunds
new comment on last change
[FIX] add dependency on account_report_company + remove unnecessary conditions
[IMP] added unit test for partner fix in completion
[FIX] conflict with most recent version of OCA/7.0
[FIX] still some PEP8 issues
Update .coveragerc to omit test directory
fix pep8 col
[FIX] conversion_dict is now created in the generic parser
replace unicode by ustr
fix pep8
[FIX] Prevent remove partial reconcile, when you use easy reconcile
[FIX] pep8
Fix pep8 issue
Merge pull request #23 from florian-dacosta/conversion_dict

[IMP] account_statement_base_import: 7.0 Conversion_dict is now created in the generic parser
fix unreachable code flagged by pylint