Log Message:
Update wip/apvlv to 0.0.7.4

Changes (0.0.7.*):
* apvlv don't support negative integer now because the '-' cause many bugs
in <C-w>- to smaller a window, apvlv don't support negative interger
from 0.0.7.4.
* add shell command line options, -h, -v and -c
* add options to disable ~/.apvlvinfo
* add a option "set autoscrolldoc=yes/no" to toggle auto scroll a doc from
end to 1st
* add a option "set pdfcache=[number]" to set the cache size of pdf object
* set pdfcache >= 2 limit for apvlv works correctly
* set no autoscroll and not continuous when pdf is a single page
* add global /etc/apvlvrc
* don't create ~/.apvlvrc automaticlly
* made fullscreen really works under some WM
* fix file is not exist segment fault
* fix the command histroy segment fault
* add document of / and ? key which appear from 0.0.3