[FIX] Account analytic plan line name..

..should not be called plan itself.
[ADD] module install/uninstall hooks.

Since 4ec71c74d1dcec96d764fb42aab856cb32fb5321, migration scripts
are not executed at module install anymore.
As this behavior was missused as "init" scripts (see [1]), this
commit re-add this possiblity via hooks.

There are 3 hooks that can be declared in the manifest file:
 - pre_init_hook: called before module installation
 - post_init_hook: called after module installation
 - uninstall_hook: called before module uninstallation

Like the "post_load" manifest option, the values for these hooks
must be a string containing the name of a method available at the
module root.
The signatures of these functions are:
 - (cr) for pre_init_hook
 - (cr, registry) for post_init_hook and uninstall_hook

[1] https://bugs.launchpad.net/openobject-server/+bug/1314680
Update account_analytic_default.py

Fix issue #270 : account_analytic_default doesn't work with company_id condition
[FIX] small fixes

- set the company_id parameters at the end of the method to avoid incompatibities with calls in account_analytic_plans
- instead of checking the context, actually pass the company_id argument in the product_change from uos_id_change
Use encodeURIComponent in place of encodeURI for website new page title, in order to escape special chars like question mark
[IMP] project: task: added reviewer_id field, linking towards a res.users, that is the
reviewer of the task. This field is automatically tracked, using a small update of the get_auto_subscribe_fields method that is
weirdly implemented.
Merge pull request #453 from odoo-dev/master-and-company-mat

[FIX] account_analytic_default: make company_id field actually work (fixes #270)
[IMP] Add filters in ir.model.fields search view.

Add "Custom" and "Base" filters in ir.model.fields search view.
Merge pull request #465 from franckbret/master

[FIX] Correctly URI encode website new page title
Merge pull request #464 from odoo-dev/master-task-reviewer-tde

[IMP] project: task: added reviewer_id field, linking towards a res.users, that is the reviewer of the task.
Merge pull request #383 from sve-odoo/patch-3

[FIX] account_analytic_plans: a line is not a plan
Merge pull request #468 from sve-odoo/patch-4

[IMP] base ir.model.field, improve search view.
Add runbot badge on README
Merge pull request #424 from odoo-dev/master-inithooks-chs

[ADD] module install/uninstall hooks.
[MERGE] merge from master