Added helper to open file with emacsclient using filename:line path

Most of console-based utilities prints filename in format
"filename:linenumber". So you may wish to open filename in that format.
This little 'advice' can do that. Just call

emacsclient filename:linenumber

and cursor will be positioned on requested line
Merge pull request #749 from lexa/emacsclient_advice

Added helper to open file with emacsclient using filename:line path
Updated with the latest prelude
Install SLIME from MELPA
Update copyright years
Setup the new flycheck-ocaml syntax checker
Update default opam commands to newest syntax

Newer versions of opam don't do argument parsing of the first argument
after `opam config exec` so everything needs to be passed as separate
arguments in the shell (i.e. unquoted).
Merge pull request #754 from RadicalZephyr/ocaml-flycheck

Ocaml flycheck
Updated to the latest upstream