Update current_version
Fix #149 : problem while fixing tel expenses
Lighter colors in pdf output
DB stored file form stuff

* Add a custom file form widget (automagically return the appropriate
appstruct on deserialization)
* Provide filter functionnality for dynamic image processing

Use those new tools for company form schema
Stores the headers and logo in the database
Use the db based logo and header in all templates
Minor stuff
Silly hack on file access for company logo and header
company forms : Set the appstruct and clear db session
filepng route and update file appstruct handling

thanks to our new custom formwidget
Route generation for files and imgs
Set default name only if no name provided

Fixes mimetype/file extension compatibility
Add migration of company files to the database
Fix default None value in config
Indent and import
Avoid duplicating reify's behaviour (already request lifetime cached)
Add a public view to access config files (are public)
Clean unused funcs
Store logo in database
Integrate accompagnement header in the db