Change development version number to the sha

atom.gyp

@@ -1,6 +1,5 @@
 {
   'variables': {
-    'version': '2.0.<!(git log -1 --format="%h")',
     'pkg-config': 'pkg-config',
     'chromium_code': 1,
     'use_aura%': 0,
@@ -46,7 +45,7 @@
       },
     },
     'xcode_settings': {
-      'VERSION': "<(version)",
+      'VERSION': "<!(git rev-parse --short HEAD)",
       'CLANG_CXX_LANGUAGE_STANDARD' : 'c++0x',
       'GCC_VERSION': 'com.apple.compilers.llvm.clang.1_0',
       'COMBINE_HIDPI_IMAGES': 'YES', # Removes 'Validate Project Settings' warning