Merge pull request #453 from ebfe/fix-build-master

Fix build with rust master
Fix build as well as most deprecation warnings
fold: actually print out empty lines
seq: allow inputs to have a unary plus
sort: implement --reverse
Merge pull request #455 from Arcterus/deprecation

Fix build and other issues
wc: boost speed to be nearly as fast as GNU
Merge pull request #456 from Arcterus/wc-speed

wc: boost speed to be nearly as fast as GNU
tail: print bytes as char instead of u8
Merge pull request #458 from dokaptur/tail

tail: print bytes as char instead of u8
Fix most deprecation warnings and remove hacky nohup code
Merge pull request #459 from Arcterus/deprecation

Fix most deprecation warnings and remove hacky nohup code
Fix warning about time being deprecated
Merge pull request #460 from Arcterus/deprecation

Fix warning about time being deprecated
fix 32-bit kernel uptime error

error: mismatched types: expected `i64`, found `i32` (expected i64,
found i32)
Merge pull request #461 from skv-headless/uptime_mismatch

fix 32-bit kernel uptime error
tr: improve speed slightly
Merge pull request #462 from Arcterus/tr

tr: improve speed slightly
tail: added size suffixes handling
Merge pull request #454 from wikol/master

tail: added size suffixes handling