Make arguments redo, subproject elimination (#1784)

* redo make args to use colons, better folder structuring system [skip ci]

* don't put spaces after statements - hard lessons in makefile development

* fix-up some other rules.mk

* give travis a chance

* reset KEYMAPS variable

* start converting keyboards to new system

* try making all with travis

* redo make args to use colons, better folder structuring system [skip ci]

* don't put spaces after statements - hard lessons in makefile development

* fix-up some other rules.mk

* give travis a chance

* reset KEYMAPS variable

* start converting keyboards to new system

* try making all with travis

* start to update readmes and keyboards

* look in keyboard directories for board.mk

* update visualizer rules

* fix up some other keyboards/keymaps

* fix arm board ld includes

* fix board rules

* fix up remaining keyboards

* reset layout variable

* reset keyboard_layouts

* fix remainging keymaps/boards

* update readmes, docs

* add note to makefile error

* update readmes

* remove planck keymap warnings

* update references and docs

* test out tarvis build stages

* don't use stages for now

* don't use stages for now

keyboards/ergodox_ez/keymaps/dvorak_42_key/README.md

@@ -5,7 +5,7 @@ This is a dvorak based layout for the Ergodox EZ. Its basic key layout is simila
 
 How to build 
 ------------
-make ergodox_ez-dvorak_42_key-teensy
+make ergodox_ez:dvorak_42_key:teensy
 
 Layers
 ------

keyboards/ergodox_ez/keymaps/dvorak_42_key/keymap.c

@@ -5,7 +5,7 @@
 
 
 // to build this keymap
-// make ergodox_ez-dvorak_42_key-teensy
+// make ergodox_ez:dvorak_42_key:teensy
 
 static bool mouse_lock = false;