Clarfied a comment; modified TODO
Began work on continuation
env table now can properly unset env vars
Cleaned up and partially annotated Makefile
Changed CC to clang; modified Makefile formatting
Changed compiler to clang
Merge branch 'master' into develop
Updated and tweaked README
Cleaned up C files

Also made them compatible with new setup with clang.
Fixed SIGINT handling for reprinting prompt
Terminating children with signals prints newline
Added TODO about process/job backgrounding