Some major updates including heuristics

- Allow to define heuristics in heuristics.yaml
- Migrate all filetypes from vim beginning with "a"
- Remove enhanced cpp syntax (it was too slow to load)
- Use setf instead of set ft for setting filetype (faster)
- Override native hauristics with au!
- Add globbing of files for packages
- Replace predefined dirs with extra_dirs and ignored_dirs
- Allow to define proper order of packages with topological sort
- Fix powershell detection
- Lint and fix many packages.yaml issues
- etc etd

ftplugin/alsaconf.vim

@@ -0,0 +1,23 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'alsaconf') == -1
+
+" Vim filetype plugin file
+" Language:             alsaconf(8) configuration file
+" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
+" Latest Revision:      2008-07-09
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+let b:undo_ftplugin = "setl com< cms< fo<"
+
+setlocal comments=:# commentstring=#\ %s formatoptions-=t formatoptions+=croql
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+endif