Issue #404 - Create common library shared between plugin/engine and installer

adblockplus.gyp

 {
-  'includes': ['defaults.gypi'],
+  'includes': [
+    'defaults.gypi',
+    'common/common.gypi',
+  ],
 
   'variables': {
     'build_type%': 'devbuild',
     'build_version%': '',
   },
 
   'target_defaults': {
     'conditions': [
       [
         'build_type=="devbuild"',
@@ skipping 13 matching lines @@
             'VERSIONINFO_VERSION_STR=\\"<(build_version).0\\"',
           ],
         }
       ],
     ],
   },
 
   'targets': [{
     'target_name': 'shared',
     'type': 'static_library',
+    'dependencies': [
+      'common',
+    ],
     'sources': [
       'src/shared/AutoHandle.cpp',
       'src/shared/Communication.cpp',
       'src/shared/Dictionary.cpp',
       'src/shared/Utils.cpp',
-      'src/shared/Registry.h',
-      'src/shared/Registry.cpp',
-      'src/shared/IE_version.h',
-      'src/shared/IE_version.cpp',
       ]
   },
-  
+
   {
     'target_name': 'AdblockPlusEngine',
     'type': 'executable',
     'dependencies': [
       'shared',
       'libadblockplus/libadblockplus.gyp:libadblockplus',
     ],
     'sources': [
       'src/engine/Main.cpp',
       'src/engine/Debug.cpp',
@@ skipping 141 matching lines @@
   {
     'target_name': 'tests',
     'type': 'executable',
     'dependencies': [
       'shared',
       'libadblockplus/third_party/googletest.gyp:googletest_main',
     ],
     'sources': [
       'test/CommunicationTest.cpp',
       'test/DictionaryTest.cpp',
-      'test/RegistryTest.cpp',
       'test/UtilTest.cpp',
     ],
     'defines': ['WINVER=0x0501'],
     'link_settings': {
       'libraries': ['-ladvapi32', '-lshell32', '-lole32'],
     },
     'msvs_settings': {
       'VCLinkerTool': {
         'SubSystem': '1',   # Console
         'EntryPointSymbol': 'mainCRTStartup',
@@ skipping 77 matching lines @@
       'Release': {
         'msvs_settings': {
           'VCLinkerTool': {
             'AdditionalDependencies': ['atls.lib'],
           },
         },
       },
     },
   }]
 }