Move reset.css to extlib and symlink it

diff --git a/mediagoblin/static/css/reset.css b/extlib/reset/reset.css
similarity index 100%
rename from mediagoblin/static/css/reset.css
rename to extlib/reset/reset.css

diff --git a/mediagoblin/static/css/extlib/reset.css b/mediagoblin/static/css/extlib/reset.css
new file mode 120000 (symlink)
index 0000000..6084e13
--- /dev/null
+++ b/mediagoblin/static/css/extlib/reset.css
@@ -0,0 +1 @@
+../../../../extlib/reset/reset.css
\ No newline at end of file