File flags readme etc can be set indifferently with either true or false

[OliverMatz]

The following two entry declarations in the file pom.xml are equivalent:

<entry>
     <name>/opt/foo</name>
     <file>foo</file>
     <readme>false</readme>
</entry>

<entry>
     <name>/opt/foo</name>
     <file>foo</file>
     <readme>true</readme>
</entry>

In both cases, the value entry foo will be flagged as a readme file.
The same applies to the other Boolean file flags, i.e. configuration, documentation, license, ghost, missingOk, noreplace.

This is not intuitive. As a user, I would assume that false and true are different. I think false should be equivalent to ommitting the xml-element.

I stumbled over this while reviewing the code of de.dentrassi.rpm.builder.EntryDetails.apply: It does not make any difference whether the value of, say, EntryDetails.readme is set to Boolean.TRUE or Boolean.FALSE. The corresponing file flag will be set in both cases.

I am currently fixing #41 and I am uncertain whether I should do the same there.