Простой (но красивый!) unix-шелл, умеет в операторы &&, ||, Pipe'ы, умеет в стрелочки и хранение и навигацию по истории. Собирать через CMake

Ivan Arkhipov 287e8330e1 Fixed terminal attributes restoring on exit		3 lat temu
CMakeLists.txt	b8792c7176 CMake minimal version update	5 lat temu
esh_deinit.c	790a4eb25d Added pipes functionality	5 lat temu
esh_deinit.h	adb96532b6 Added environment vars substitution support	5 lat temu
esh_history.c	ddab14219b Minor memory management improvements (in esh_main_loop & esh_history)	5 lat temu
esh_history.h	ddab14219b Minor memory management improvements (in esh_main_loop & esh_history)	5 lat temu
esh_init.c	790a4eb25d Added pipes functionality	5 lat temu
esh_init.h	2d197b91a0 Finished initial command execution functions (NEED IMPL MEMORY CLEAN-UP!!!)	5 lat temu
esh_main_loop.c	287e8330e1 Fixed terminal attributes restoring on exit	3 lat temu
esh_main_loop.h	adb96532b6 Added environment vars substitution support	5 lat temu
esh_misc.c	790a4eb25d Added pipes functionality	5 lat temu
esh_misc.h	2d197b91a0 Finished initial command execution functions (NEED IMPL MEMORY CLEAN-UP!!!)	5 lat temu
esh_types.h	790a4eb25d Added pipes functionality	5 lat temu
main.c	7f42ad0265 Basic architecture impl, initialisation process full impl	5 lat temu
shell.pdf	af5942ded0 Added shell architecture description	5 lat temu
string_misc.h	adb96532b6 Added environment vars substitution support	5 lat temu