fix for postgresql when using an alias.
possibly fixed a problem with virtualfields in fields option of SQLFORM.grid, thanks peckto
fixed issue 1594:radio widget layout conflicts with bootstrap, thanks Paolo Caruccio
synced web2py_bootstrap.css, fixed issue 1595:web2py_bootstrap.css in welcome, admin and examples app not in sync anymore, thanks lightdot
fixed issue 1591:Allow sql log customization
no more autocomplete for date/time inputs, thaks Paolo
Merge pull request #141 from carpaIdea/master

admin - site page - small visual enhancements
Merge pull request #143 from michele-comitini/table_name_quoting_bug

fix for postgresql when using an alias.
define_tables(migrate=None,fake_migrate=None) defaults to DAL(migrate=..,fake_migrate=...), thanks Paolo and Jonathan
improved scripts/extract_mysql_models.py, thanks Andre Kablu