Email is dead, long live email. If many announcements were made in 2014 regarding to collaboration solutions, I guess few people had predicted that the rock star of the year would be the good old email we've been trying to eradicate for the last 8 years. The funny thing is that everyone even finds this normal, as if email appeared to be the most accomplished form of...enterprise social network. The beginning of this new year is the right moment to have a look at the collaboration solution industry and...