Cherry picking commits for importing the statement_base_import module
Removed lsv_dd module wich will be in separate branch.
PEP8
Added external dependencies check.
PEP8
Add xml to attachments for postfinance statement import.
[FIX] raiffeisen line parsing, get only last element for amout parsing
[FIX] binary file postfinance import bug
Added example files with import unit tests. Corrected some bugs.
Fixed importation order problem. Added missing modifications to commit.
Conversion_dict is now generated in generic parser...

...adapts to the changes introduced in #23
Corrected Raiffeisen detailed parser.
Cherry pick from LP branch
Removed module account_statement_base_import which is in another branch.
Add bvr ref generation if account is IBAN for LSV
PEP8 fixes. Add postfinance setup description into module description.
Add banking dependency in .travis
Fixed banking dependency in .travis
[ADD] LSV-DD description in README.md
[ADD] unidecode install in .travis