[gimp-web] (12 commits) ...Add development downloads page

[Michael Schumacher <schumaml src gnome org>]

Summary of changes:

  1780f4c... Fix parsing errors (*)
  6008209... Added md5 hash for GIMP 2.9.6 source (*)
  e2e96a3... Added dedicated page for downloads of the developments vers (*)
  2954526... Add relase date and Windows installer (*)
  67f1687... Fix wrong macOS development DMG links (*)
  87e1357... Added 2.9.2 and 2.9.4 source files, and minor formatting (*)
  d8e3e3f... Correct order of date and version (*)
  0a2c2a0... Changed description for Windows installer and attempt condi (*)
  953cd46... Conditional message depeding on whether a macOS package fil (*)
  dda68f2... Note about outdated package in place for macOS DMG, pending (*)
  8a43fbb... Add links between stable and development downloads pages (*)
  f3dbc24... Add development downloads page

(*) This commit already existed in another branch; no separate mail sent