composer/installers — pull request #101 by breath-co2 (2013-09-05 14:27:57+00:00)
Title: Fix for custom install path can't link file of bin-dir

See issue https://github.com/composer/composer/issues/2230

If the library of custom install have some code like:
``` json
{
"bin" : [
"bin/merge-assets"
]
}
```
while install fail.

Output error message like:
```
[InvalidArgumentException]
$from (~/Sites/test4/bin/merge-assets) and $to (libraries/test//bin/mer
ge-assets) must be absolute paths.
```