bumps version to 0.4.1
fix(watch): watch all less and sass files under src

To detect all changes which results in different CSS code, fabs has to watch all less and sass files. LiveReload is triggered by changes to the resulting css file. If a less file was changed and the resulting css code didn't, no LiveReload event will be triggered.

Closes #23
doc(changelog): update changelog for 0.4.1
Merge branch 'hotfix/0.4.1'