Update tagline

README.md

-vcsh - manage and sync config files via git
+vcsh - manage config files in $HOME via fake bare git repositories
 
 # Index #
 

doc/vcsh.1.ronn

-vcsh(1) - manage and sync config files via git
-==============================================
+vcsh(1) - manage config files in $HOME via fake bare git repositories
+=====================================================================
 
 ## SYNOPSIS