Fix build for latest Rust
Use -O instead of --opt-level 3 (closes #194)
tail: rewrite tail_bytes and tail_lines as one macro
Merge pull request #464 from Arcterus/fix-build

Fix build for latest Rust and switch to -O
nohup: fix build on Macs (closes #463)
Merge pull request #465 from Arcterus/master

nohup: fix build on Macs (closes #463)