Only load the config file if it exists
Merge pull request #45 from maclarke/test-CONFFILE

Only load the config file if it exists. Thanks to maclarke.
Remove dependency on lockfile-progs

Use flock to manage lockfiles since it's more likely to be installed.
Merge pull request #46 from maclarke/flock

Remove dependency on lockfile-progs. Thanks to maclarke.
Update README: New contributor maclarke
Correct a typo.

All my changes to this repository are under the Public Domain (Creative
Commons Zero) / MIT/X11 / GPLv2-and-above or your choice of licence.
Remove trailing space.
Merge pull request #52 from shlomif/master

README.md: correct a typo and get rid of trailing space.
add -x parameter for aria2c to speed up downloading

manpage:
> -x, --max-connection-per-server=<NUM>
>              The maximum number of connections to one server for each download.  Default: 1

increase the number can briefly help speed up the progress.
Merge pull request #61 from PeterDaveHello/patch-1

add -x parameter for aria2c to speed up downloading
Update ppa info, refer to #58
Merge pull request #62 from PeterDaveHello/patch-1

Update ppa info, refer to #58
Update README.md
add -x parameter for aria2c in apt-fast.conf (forgot in 95f79b1)
add --min-split-size=1M parameter for aria2c to enhance parallel

the default value is 20M, too large for normal deb packages
add -s parameter for aria2c to enhance parallel

the default falue is 5, is user set MAXNUM larger than 5, it will be limited by it
Merge pull request #63 from PeterDaveHello/patch-1

Update README.md
Merge pull request #64 from PeterDaveHello/enhance_aria2c_parallel

Enhance aria2c parallel
Update README.md
Merge pull request #67 from PeterDaveHello/patch-1

Update README.md