Reorganize module loading.

We now use webpack instead of SystemJS, effectively bundling modules
into one file (plus commons chunks) for every entry point.  This results
in a much smaller extension size (almost half).  Furthermore we use
yarn/npm even for extension run-time dependencies.  This relieves us
from manually vendoring and building dependencies.  It's also easier to
understand for new developers familiar with node.

1 files changed, 2 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 958dc6d25..9a9b20544 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,5 @@ node_modules
 
 coverage/
 coverage-*.json
+
+dist/