[fpc-devel] Output flush on pipes

[Florian Klaempfl]

The error numbers didn't change, they are keep unique.

I propose to do the following:
- add an option -vm (machine readable output)
Using this option the compiler outputs the messages csv like and flushes
after each message:
message type <tab> file <tab> line <tab> column <tab> error number <tab>
complete error message <tab> message template (i.e. Type $1 expected, $2
found <tab> parameter 1 <tab> parameter 2 <tab> parameter n

To avoid trouble with future versions, a header line will describe each
column.