Add "all" target for build.bat.

build.bat

@@ -1,13 +1,13 @@
 @echo off
 REM A simple script to build different cppcheck targets from project root
-REM folder.
+REM folder. This script can be run from VS prompt or Qt prompt.
 REM
 REM Usage: build <target> [release|debug]
-REM  where <target> is any of cppcheck/gui/tests
+REM  where <target> is any of cppcheck/gui/tests/all
 REM        release or debug is the configuration
+REM  all-target builds both cppcheck and gui.
 REM
 REM TODO:
-REM  - add "all" target
 REM  - run tests too
 
 if "%1" == "" goto help
@@ -26,13 +26,15 @@ if "%2" == "debug" set TARGET=debug
 if "%1" == "cppcheck" goto cppcheck
 if "%1" == "gui" goto gui
 if "%1" == "tests" goto tests
+if "%1" == "all" goto cppcheck
 goto help
 
 :cppcheck
 cd cli
 qmake -config %TARGET%
 %MAKE%
 cd ..
+if "%1" == "all" goto gui
 goto end
 
 :gui
@@ -52,7 +54,8 @@ goto end
 
 :help
 echo "Syntax: build <target> [debug|release]"
-echo "  where <target> is any of cppcheck/gui/tests"
+echo "  where <target> is any of cppcheck/gui/tests/all"
 echo "        debug or release define used configuration"
+echo "  all- target builds both cppcheck and gui.
 
 :end