#66 provide description for completion keyword

[c9s]

provide description for completion keyword via keyword description files. :)

such like:
set keyworddesc=~/.perlfuncdesc

and

.............+------------------------------------+
|open ||open [FileDescriptor],[opts],[file] |
|print || |
| ||create a file escriptor .... |
| || |
| || |
| || |
| |+------------------------------------+
| |
| |
| |
| |
'-----------'

[c9s]

interface

[c9s]

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File Added: completion.txt