doc: Unlink docs from the rest of the build process.

Since generated man pages are also included, we can't
guarantee proper timestamps. This should fix issues that trigger doc
building when it isn't needed.

Signed-off-by: Loui Chang <louipc.ist@gmail.com>

README.md

@@ -24,7 +24,7 @@ Toxic is a [Tox](https://tox.im)-based instant messenging client which formerly
 
 ##### Documentation
 * [Asciidoc](http://asciidoc.org/index.html) (only required for regenerating manpages)
-  * Run `make doc` after editing the asciidoc files to regenerate the manpages.
+  * Run `make doc` in the build directory after editing the asciidoc files to regenerate the manpages.
   * **NOTE FOR DEVELOPERS**: asciidoc files and generated manpages will need to be commited together.
 
 ### Compiling

build/Makefile

@@ -46,7 +46,7 @@ endif
 -include $(CFG_DIR)/checks/check_features.mk
 
 # Targets
-all: toxic doc
+all: toxic
 
 toxic: $(OBJ)
 	@echo "  LD    $@"

cfg/targets/install.mk

@@ -1,5 +1,5 @@
 # Install target
-install: toxic doc
+install: toxic
 	mkdir -p $(abspath $(DESTDIR)/$(BINDIR))
 	mkdir -p $(abspath $(DESTDIR)/$(DATADIR))
 	mkdir -p $(abspath $(DESTDIR)/$(DATADIR))/sounds