Spawn gevent using same python executable

Solves issues of spawning wrong version of python or popping out of virtualenv
[FIX] website_sale: tour; product split kanban view of product and product template
Pull request feedback by chs
[IMP] Invoice_state based on delivery wizard recheck + returns and invoice_state
[FIX] Google Calendar - Split the last underscore because Google uses sometimes '_' in their own google_id. Retrieve the parent event_id to exclude when the exlusion has been done in google
[FIX] website_forum: tag pager url

When browsing a tag, the pager url was not matching the route of the controller
Merge pull request #524 from odoo-dev/saas-5-website_sale-browse-category-chm

[FIX] website_sale: retur the browse record of category insead of int
[FIX] website_sale: tour test customize
Update TAX amount eval change 12% to 15%

Update TAX amount eval thats change 12% to 15% in this year 2014
Merge pull request #521 from odoo-dev/master-graphview-measures-fix-ged

[FIX] graph/pivot tables: remove non stored fields from available measures
Merge remote-tracking branch 'odoo/master' into master-default-order-list-ged
Merge pull request #90 from odoo-dev/master-uninstall-module-tpa

[FIX] issues when uninstalling modules: unlink ir.action.todo which are related to actions which will be deleted (fix issues when uninstalling modules) + check for menu existence before displaying need action
[IMP] report intrasat: move field from the view of product product to product template
[IMP] Calendar - Add an explicit /web in url from invitation mail since it required to works
[FIX] l10n_in: refactor indian chart of accounts

Added standard and Schedule-vi chart with taxes
removed private and public chart with taxes files
[FIX] STOCK: Fixed the warning '' 'tree_view_ref' requires a fully-qualified external id (got: 'view_move_picking_tree' for model stock.move). Please use the complete 'module.view_id' form instead. ''
[IMP] improves sorting mechanisms in datasets

Create a deserialize_sort method and add a set_sort method to
datasets.  The set_sort method is useful to avoid duplicating code
in lists and kanban views (to set the initial default order)
[FIX] website_sale: rounding price; typo and search sequence of membership
[FIX] membership: remove domain with 'code' filter from the product search view
[IMP] Website Sale - ribbon - html class from product.style is not required, so we need to display it as empty in website to avoid an internal 500