Speed up doc generation
Speed up doc generation

We don't want to generate all yard documentation, just the .yardoc
database.

SoftSwiss/active_admin,activeadmin/activeadmin,vraravam/activeadmin,siutin/activeadmin,mauriciopasquier/active_admin,deivid-rodriguez/activeadmin,varyonic/activeadmin,wspurgin/activeadmin,activeadmin/activeadmin,deivid-rodriguez/activeadmin,javierjulio/activeadmin,mrjman/activeadmin,mauriciopasquier/active_admin,varyonic/activeadmin,varyonic/activeadmin,activeadmin/activeadmin,javierjulio/activeadmin,mauriciopasquier/active_admin,SoftSwiss/active_admin,vraravam/activeadmin,wspurgin/activeadmin,SoftSwiss/active_admin,siutin/activeadmin,mrjman/activeadmin,siutin/activeadmin,deivid-rodriguez/activeadmin,vraravam/activeadmin,wspurgin/activeadmin,mrjman/activeadmin,javierjulio/activeadmin