fix(sourcemaps): Add *.ts files to built packages

In order to create correct sourcemaps, all target sources
must be available at generation time. Additionally, when
the browser loads source maps, they must be available
to the browser at the specified path.

This fix ensures that *.ts files are shipped in the
npm package and bower component.

Fixes angular-ui/ui-router#3465.

Author: aeisenberg

.npmignore

@@ -2,7 +2,6 @@
 **/.*
 .*
 
-src
 test
 scripts
 node_modules