The Friends of the South End Library was among a dozen group of downtown non-profits that received a total of more than $210,000 from the PruPAC  fund, established 25 years ago by developers to benefit the neighborhoods around the Prudential Center.Glyn Polson, president of the South End library's Friends group, applied for the grant to help pay for the cost of  an automatic door at the  branch. Once installed, the library will be one of a handful of BPL branches that is fully handicapped accessible. The Prudential Project Advisory Committee (PruPAC), a city-formed group composed of neighborhood residents and business representatives, had awarded the grant earlier this year but not yet issued the check. Polson is working closely with the BPL's Facilities Department to complete the project as quickly as possible.