remove unused clean from makefile
split make and make install
update install instructions, dependencies
make minor adjustments to readme
update install instructions, add man page
remove pledge, unveil for edit for arbitrary editors
add mailing list info to readme
correct security description in readme
fix cold start shh migration bug
fix padding oracle capitalization in readme
switch to aes-gcm, add version .shh file
add documentation for .shhconfig
add support for project-level config file
output useful error instead of panic