Makefile: Add `install` target
Makefile: Add `install` target

to make it easier to update tsr and tsuru-client when developing

hcxiong/tsuru,Endika/tsuru,hugoantunes/tsuru,cgvarela/tsuru,cezarsa/tsuru,cgvarela/tsuru,jblancett/tsuru,guilhermebr/tsuru,kgrvamsi/tsuru,jblancett/tsuru,gciotta/tsuru,cezarsa/tsuru,4eek/tsuru,ggarnier/tsuru,hugoantunes/tsuru,gwmoura/tsuru,ArxdSilva/tsuru,4eek/tsuru,Endika/tsuru,ArxdSilva/tsuru,gciotta/tsuru,tsuru/tsuru,kgrvamsi/tsuru,RichardKnop/tsuru,gwmoura/tsuru,hcxiong/tsuru,tuxmonteiro/tsuru,cezarsa/tsuru,mderaldo/tsuru,4eek/tsuru,ArxdSilva/tsuru,hcxiong/tsuru,ggarnier/tsuru,firebitsbr/tsuru,tsuru/tsuru,mderaldo/tsuru,firebitsbr/tsuru,tuxmonteiro/tsuru,Endika/tsuru,ArxdSilva/tsuru,RichardKnop/tsuru,ggarnier/tsuru,gciotta/tsuru,tsuru/tsuru,cgvarela/tsuru,cezarsa/tsuru,firebitsbr/tsuru,guilhermebr/tsuru,ggarnier/tsuru,gwmoura/tsuru,jblancett/tsuru,tsuru/tsuru,mderaldo/tsuru,tuxmonteiro/tsuru,RichardKnop/tsuru,guilhermebr/tsuru,kgrvamsi/tsuru,guilhermebr/tsuru