highlight: Generate pygments style sheet dynamically
This patch allows a per-repository (for example, within a hgwebdir) selection
of pygments_style web option. No static .css files required.
Test edited by pmezard (compatibility fixes)
% create test repository
adding a
adding b
adding c
% churn all
user3 3 ***************************************************************
user2 2 ******************************************
user1 1 *********************
% churn up to rev 1
user2 2 ***************************************************************
user1 1 *******************************
% churn with aliases
alias3 3 **************************************************************
user2 2 *****************************************
alias1 1 ********************
% churn with column specifier
user3 3 ***********************
user2 2 ***************
user1 1 *******