[FIX] address div more to the left on external reports
[FIX] Report: do not raise when wkhtmltopdf returns a code 1. In most cases, it is due to some http requests which did not success *but* the pdf is still acceptable. Far from the best commit ever, but it avoids to completely crash when just a link to an image is wrong
[FIX] Report: double the default height/width of barcode image to avoid a blurred/unusable barcode once integrated in a report
[FIX] Report: removed psutil/signal/openerp worker crap
[FIX] Report: less verbose error message
[FIX] Report: inform the user that he may not print a pdf report while his openerp is running with only one worker; adapt method to extract wkhtmltopdf version to also work on mac where the ouput of '--version' is different from gnu/linux binary
[FIX] ir_actions: adapt render_report when called in a tests/qweb report context to generate the pdf only if a directory has been provided
[FIX] Report: get the wkhtmltopdf version in a cleaner way with a simple regex
Merge remote-tracking branch 'odoo/saas-4' into saas-4-report-fixes-sle
Merge remote-tracking branch 'odoo/saas-4' into saas-4-report-fixes-sle
Merge pull request #119 from odoo-dev/saas-4-report-fixes-sle

[FIX] Multiple report fixes including better handling of rendering a report with one worker (and the removal of the workers creation) and some report views changes (address block more to the left)