Support document writers

[na4zagin3]

Satyrographos needs to support document writers as well as library creators.

• satysfi subcommand to run SATySFi (Add satysfi subcommand #137)
• build subcommand (Add build subcommand #194)
• Document buildfile
  • Lang 0.0.3 (Build script 0.0.3 #168)
    • New format type (Add Script lang 0.0.3 #202)
    • Lint
  • util dep-make subcommand to extract dependency graphs
    • .saty input support (Improve commandline options of util deps-make subcommand #203)
    • Markdown input support (Util deps-make: Support markdown inputs #205)
• Templates
  • .saty with Makefile (Add doc-make template #206)
  • .saty with OMake
• Autogen libraries
  • %today (Add %today autogen package #201)
• Library version lockdown file (Lockfile for reproducible builds #98, Generate lockfile for reproductive document compile #83)
• Automatically download/install libraries (Feature: Download from the Internet #1)