PostgreSQL pager pspg is ready to work

I spent lot of time on work on pspg. These points are done:

• support for expanded mode
• fixed resizing
• two new styles
• start is significantly faster
• lot of display errors was fixed

 This code should be compiled from source code. If you want to test it - you need develop packages of ncursesw. If you don't need wide char support, you can compile pspg against ncurses library (in this case a Makefile should be modified).

Usage:

\setenv PAGER 'pspg -s 2'
\pset pager always
select * from pg_stat_activity;