refine bashrc to source file under .shell dir; update PS1
refine bashrc to source file under .shell dir; update PS1

oxnz/dot-files,oxnz/dot-files,zzqrjcode/dot-files,oxnz/dot-files,oxnz/dot-files,zzqrjcode/dot-files,oxnz/dot-files,zzqrjcode/dot-files,zzqrjcode/dot-files,zzqrjcode/dot-files