termux-notification --help-actions update for direct reply (termux-ap…

…i #320)

termux-job-scheduler: Add --persisted option, see termux/termux-api#316

shellcheck most scripts

one thing left to do is unifying and standardizing the way the argument
string for the final call to termux-api is built.

Merge pull request #84 from bndeff/usbapi

Add a USB API compatible with libusb

termux-notification: add --help-actions

fixes #37

termux-job-scheduler: fix doc

termux-job-scheduler: Fix --network doc

termux-notification: allow using STDIN as content

... without hanging the script

fixes termux/termux-api#271 and #71

Merge pull request #72 from xalexalex/master

termux-notification: implement ongoing, alert-once, group, image-path, and the media notification type

Merge pull request #53 from tomty89/app_995

termux-share: companion of termux/termux-api#253