Release 0.99.1

Major changes in 0.99.1

In preparation for 1.0, this release depends on a recent (0.11.8) flatpak.

• New libdir build option
• Support loading default options from sdk
• Add support for overriding c/cpp/ld/etc flags in a module
• Now uses libcurl to download things instead of soup,
  which means we now support ftp urls.
• Don't prune build caches when building with --{export,finish}-only
• rename-desktop-file now handles launchables in the appdata
• archive sources support dest-filename
• archive and file sources now support mirror-urls to list
  extra urls in case of network problems.

$ sha256sum flatpak-builder-0.99.1.tar.xz 
25faf5332973bda2914f65cbf1ff1281deb1ff67bbc2b303a707778d09e5fe75  flatpak-builder-0.99.1.tar.xz