[web] xml_escape CheckBox and Radio labels (closes #7672764)

[test/tox] Enforce installation of modified yapps 580a6821713d is not enough for tox apparently... The thing is that it will first install dependencies (the `deps` option from tox.ini), actually pulling yapps from Logilab github but then, it will install the project (that is, CubicWeb) from the sdist *along with its dependencies*, which will pull yapps again and override the previously installed version for some mysterious reason. So add a `pip install` command in tox.ini, so that the modified yapps is the last one installed.

[web] delete unused PropertySheet._sourcefile_mtime

[etwist] remove no-longer-necessary uicache cleaning It was done before we were actually up, which means it could be too eager when combined with #6893185. Closes #6893247.

[web] remove PropertySheet._cache Instead of remembering that a css file has been processed, we re-process it at every request. This prevents our cache getting out of date with the file system. Closes #6893185 While we're at it, write the file atomically so that we don't risk serving partial data.

[test] Add missing u'' Test actually works in py3k, but not in python 2... That has to be a first!

[data] Use correct syntax to unset CSS attributes (closes #8602446) 'default' is actually a recognized CSS cursor name (the regular pointer). Using this value doesn't revert to whatever cursor DOM elements have by default ('pointer' on links, 'text' on text, etc). The proper way to unset a CSS attribute on DOM elements is to set it to an empty string. http://stackoverflow.com/questions/2027935/how-to-remove-css-property-using-javascript

[server] install custom sql scripts before creating tables for the schema A cube might need something like 'CREATE EXTENSION postgis' before creating tables for its entities, to add new final types.

[hooks] update internal URL in doc string

[doc] Fix restructured tables + improve english a bit

[debian] Install dataimport package Closes #8173104.

[web/test] Remove use of old test API to silence warning

[web/views] Fix sqlite unicode warning

[devtools] Fix sqlite unicode warning

[tests] Don't import QUnitTestCase into tests' global namespace Unittest's test loader will try to execute QUnitTestCase's test_javascripts method. However this class is intended to be subclassed, not to be executed directly. This change has the following consequences: * slightly faster test execution * almost all rtags warnings are gone

[devtools/qunit] Fail quickly if firefox is not installed

[devtools/qunit] Remove unused code VerboseCalledProcessError is unused since 3905682ece11.

[py3k] import range using six.moves Also, use create_entity instead of hand-crafting RQL queries. Fixes regression introduced in commit 768d332de17b.

[dataimport] remove size constraint handling We do not want to silently truncate data. If that is wanted, the application-specific importer should handle that itself. [v2: Keep the get_size_constraints function so applications don't have to reimplement it if they need to keep the truncate behaviour]

[dataimport] fix doc string to stop referring to the old API

[dataimport] drop duplicate init of MassiveObjectStore.sql

[dataimport] remove implicit commits from MassiveObjectStore Let the user decide when to commit the transaction.

[dataimport] drop extra indirection through MassiveObjectStore._initialized dict We already have self.__dict__, no need to add another one for a static set of keys.

[dataimport] remove remaining references to dataio from MassiveObjectStore In particular, rename metadata tables to live in the ^cw.* namespace.