Use `waitforit`

This binary makes use of waitforit. The only tangible effect this should have is the new -T / --not-elapsed flag, but at some point may allow more &/| combinations of values to be used.

v0.2.0

This version adds --[not-]update and --[not-]size options that check for file modification times and file sizes. The positive versions (--update, -u, --size, -s) check for any change to the target values. The negations (--not-update, -U, --not-size, -S) check for any two consecutive values that are identical.

These may be useful in waiting for a download to complete (waitfor -S ./Downloads/install-disc.iso); your Rust binary to finish compiling (waitfor -u ./target/release/waitfor), etc.

Initial release

Initial version built for Linux. Self-contained stripped ELF executable.