Added Implementation Agreements (https://github.com/BuildingSMART/BCF/issues/28)
Synchronized the header styles with the rest of the document.
Added information abot bcf.version.
Improvements according to Erik's comments.
add bcf.version
add version.xsd
add status to comment
add bcf.version
add version.xsd
add status to comment
Merge branch 'master' of https://github.com/linhard/BCF
add comment status
Merge pull request #33 from pasi-paasiala/master

Added Implementation Agreements (Issue 28)
Merge pull request #37 from rahulsule/master

VisualizationInfo can have only one Bitmap #36
Merge pull request #41 from linhard/master

fix issue #29, add version schema, add version xml
add plural to Label and DocumentReference
Merge pull request #42 from linhard/master

add plural to Label and DocumentReference
Merge remote-tracking branch 'upstream/master'