init.el: tweak check-large-file-hook function, make vc* and magit work for link, set projectile mode line indicator, set guide-key buffer position
init.el: remap C-a/e to new functions, fix projectile problem, add modeline-posn package
snippets: add doc/dockblock and modify main snippets for cc-mode
elpa: add modeline-posn package, updates