correct TDINDWG and TDUSERTIMER in a new dxf file
Merge remote branch 'bertmaster/master'
add type of data in according to group code
add Bert to credits of the documentation
Merge remote branch 'bertmaster/master'
Documentation: added DXF binary description
Examples: added R10 ENTITIES example file
Documentation: updated DXF binary description
Merge remote-tracking branch 'bertmaster/master'

Upgrade from original project
added DXF 2014 HEADER
Merge pull request #20 from paolo-caroni/master

Upgrade of documentation