Humble v1.2.4

[mhubii]

• Remove robot name from configs and use frame_prefix from robot state publisher instead
• Add offline build option, refer to offline build option? #104 (to be fixed in Check fri availability to allow offline build fri_vendor#1)
• Removed robot name from joint names, e.g. lbr_A1 -> A1
• Added PID for asynchronous control rate
• Simplified names of classed, e.g. LBRApp -> App
• Add utils.hpp for PID and exponential filter