Removing postgres targets and code from TSK

appveyor.yml

configure.ac

debian/control

tsk/auto/Makefile.am

tsk/auto/case_db.cpp

tsk/auto/db_connection_info.h

tsk/auto/db_postgresql.cpp

tsk/auto/tsk_case_db.h

tsk/auto/tsk_db.cpp

tsk/auto/tsk_db.h

tsk/auto/tsk_db_postgresql.h

tsk/tsk_config.h.in

win32/BUILDING.txt

win32/blkcalc/blkcalc.vcxproj

win32/blkcat/blkcat.vcxproj

win32/blkls/blkls.vcxproj

win32/blkstat/blkstat.vcxproj

win32/callback-cpp-sample/callback-cpp-sample.vcxproj

win32/callback-sample/callback-sample.vcxproj

win32/fcat/fcat.vcxproj