Anxious(v0.5.0)

hard fork transition at block number 595888

It will came into force around August 11, 2018

• Urgent update of consensus algorithm, in order to match the next week plan.
• Fix the compile error.
• Fix golang version verify error.
• Fix the consensus contract out of gas hidden danger

Note. the makefile already changed , please use 'make smc' to build the source