Store build information instead of using app->cur_idx; Assume C-like warning messages when running make when the current file is a Makefile; Moved some msgwin setup and cleanup code to msgwindow.c; Moved utils_parse_compiler_error_line to msgwindow.c

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@714 ea778897-0a13-0410-b9d1-a72fbfd435f5