Allowed to skip default packages via --skip-default-package flag

platformio/commands/install.py

@@ -8,14 +8,13 @@ from platformio.platforms.base import PlatformFactory
 
 @command("install", short_help="Install new platforms")
 @argument("platforms", nargs=-1)
-@option('--with-package', multiple=True, metavar="<package>")
-@option('--without-package', multiple=True, metavar="<package>")
-def cli(platforms, with_package, without_package):
+@option("--with-package", multiple=True, metavar="<package>")
+@option("--without-package", multiple=True, metavar="<package>")
+@option("--skip-default-package", is_flag=True)
+def cli(platforms, with_package, without_package, skip_default_package):
 
     for platform in platforms:
-
         p = PlatformFactory().newPlatform(platform)
-
-        if p.install(with_package, without_package):
+        if p.install(with_package, without_package, skip_default_package):
             secho("The platform '%s' has been successfully installed!" %
                   platform, fg="green")

platformio/platforms/atmelavr.py

@@ -16,12 +16,14 @@ class AtmelavrPlatform(BasePlatform):
 
         "toolchain-atmelavr": {
             "path": join("tools", "toolchain"),
+            "alias": "toolchain",
             "default": True
         },
 
         "tool-avrdude": {
             "path": join("tools", "avrdude"),
-            "default": True,
+            "alias": "uploader",
+            "default": True
         },
 
         "framework-arduinoavr": {

platformio/platforms/timsp430.py

@@ -16,12 +16,14 @@ class Timsp430Platform(BasePlatform):
 
         "toolchain-timsp430": {
             "path": join("tools", "toolchain"),
+            "alias": "toolchain",
             "default": True
         },
 
         "tool-mspdebug": {
             "path": join("tools", "mspdebug"),
-            "default": True,
+            "alias": "uploader",
+            "default": True
         },
 
         "framework-energiamsp430": {

platformio/platforms/titiva.py

@@ -16,12 +16,14 @@ class TitivaPlatform(BasePlatform):
 
         "toolchain-gccarmnoneeabi": {
             "path": join("tools", "toolchain"),
+            "alias": "toolchain",
             "default": True
         },
 
         "tool-lm4flash": {
             "path": join("tools", "lm4flash"),
-            "default": True,
+            "alias": "uploader",
+            "default": True
         },
 
         "framework-energiativa": {