General theme compatibility improvements

[johnjamesjacoby]

Theme compatibility needs some auditing before 2.1 is ready for launch. Use this ticket for any changes.

[johnjamesjacoby]

(In [3779]) Setup default theme compatibility in bbPress::setup_theme()

• Sets early on bbp_setup_theme so functions and files can be included
• Still allows plugins to override earlier
• See #1766

[johnjamesjacoby]

(In [3780]) In bbp-twentyten:

• Rename functions.php to bbpress-functions.php to avoid overloading
• Load JS in footer
• Smarter default global vars
• Do not create a global variable
• See #1766

[johnjamesjacoby]

(In [3781]) Pass param to bbp_get_template_locations() to allow locations to be filtered based on templates being queried. See #1766.

[johnjamesjacoby]

(In [3782]) Turn BBP_Default class into smarter default for theme compat

• Additional comments to help theme developers move files around
• Check theme support, and tweak the defaults as needed
• Use the pinking shears
• Use local variables for script locations
• See #1766

[johnjamesjacoby]

(In [3783]) Remove theme setup action from bbp-core-actions.php, as it's now in the bbPress class.

• Tweak inline doc for bbp_load_theme_functions action
• Trust bbp_setup_theme_compat() to set the theme compat regardless of what's there
• See #1766

[johnjamesjacoby]

Currently all permutations of theme setups are working for bbPress 2.1. Closing this as fixed. New bugs should get new tickets.