Remove custom erc notifications code

It should be replaced with the use of something like
https://github.com/jwiegley/alert
Bind info-display-manual to C-h C-i
Disable helm-quick-update

It is not needed anymore since helm-candidate-number-limit is
small (less than several thousands). If this is the case, then there's
no difference between quick update and no quick update execution time.
Enabling helm-quick-update makes helm buffer flashing for every entered
character to retrieve new candidate list, which would annoy user.
Merge pull request #741 from tuhdo/master

Disable helm-quick-update
Add prelude-term-buffer-name variable

This provides multi-term support via .dir-locals.el for example.
Merge pull request #737 from dougm/term-buffer-name

Add prelude-term-buffer-name variable
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
Merge pull request #2 from bbatsov/master

upstream update