Add an update-node-modules Makefile target

Currently to update ngeo (or openlayers) to the latest "master" one must manually remove the "node_modules/ngeo" directory first (rm -rf node_modules/ngeo). This PR adds an "update-node-modules" target that does "npm install --force". This forces the re-installation of all the node dependencies, which will effectively download the latest "master" for ngeo.
Update project to Angular 1.3.4
Merge pull request #88 from Geoportail-Luxembourg/update-angular

Update project to Angular 1.3.4
Merge pull request #87 from Geoportail-Luxembourg/update-ngeo

Add an update-node-modules Makefile target
Annotate MainController with @export
Load ngeo's watchwatchers script in dev mode

One can then use countWatchers() in the console to display the current number of Angular watchers.
Manually install nosexcover and setuptools_git

This is to workaround a download problem when behind a proxy. See https://github.com/Geoportail-Luxembourg/geoportailv3/issues/83 for information on the problem.

Fixes #83.
Merge pull request #99 from Geoportail-Luxembourg/watchwatchers

Load ngeo's watchwatchers script in dev mode
Merge pull request #97 from Geoportail-Luxembourg/export

Annotate MainController with @export
Merge pull request #98 from Geoportail-Luxembourg/nosexcover

Manually install nosexcover
Adding webfonts + close button styling
Merge pull request #100 from Geoportail-Luxembourg/close_btn_styling

Adding webfonts + close button styling
Merge branch 'master' into languages
added test view to check translation of strings