Added ui.partial and other functions, which allow partial content replacement using XMLHttpRequests; Image support for ui.link

Also includes following changes:
- Fix for rocketcgi library to accept POST data content-types, which contain additional charset information.
- Support arrays passed as params to encode.url (only for keys ending with "[]")
- Version information changed to "1.0.7"

Documentation for added functions is not yet complete.

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/framework/env/ui/is_partial_loading_enabled.lua	Fri Feb 12 18:40:22 2010 +0100
     1.3 @@ -0,0 +1,11 @@
     1.4 +--[[--
     1.5 +result =
     1.6 +ui.is_partial_loading_enabled()
     1.7 +
     1.8 +TODO: documentation
     1.9 +
    1.10 +--]]--
    1.11 +
    1.12 +function ui.is_partial_loading_enabled()
    1.13 +  return ui._partial_loading_enabled
    1.14 +end