add deployment script
introduce isexe predicate
dirtys: make requirepass optional
git: add `gge` - git grep and edit
git: add glf for gl --follow
json: add jsextract, a fast-ish json key-value extractor
utils: add freq, a simple frequency function
Revert "json: add jsextract, a fast-ish json key-value extractor"

This reverts commit f2c6288fed5e48b204a4c0639833037923d875aa.

Replaced by the 'reform' utility, see:
    https://github.com/yaniv-aknin/reform
path: if ~/.opt/bin exists, add it to path
utils: add a compatibility alias to md5sum
various compatibility fixes
add elegant shell colour functions
add indent utility
bin/striplines: introduce striplines
set HIST_IGNORE_SPACE; space prefixed command wont be remembered
add oneline/multiline utility
add green to S08_colors
add notification helpers
linux utils: add wait for pid
add sound support to and-notify