Added firstPage function and evenPage function to bring Footer Element
in conformity with Header Element
Merge branch 'footer' of github.com:basjan/PHPWord into develop
Corrected typo to 'const POSITION_HORIZONTAL_CENTER = 'center';' and
added examples to Sample_13
Fixed a bug, that when a second header was added to a section, all
images added to the second header were assigned to the first header,
resulting in at least a corrupted DOCX.
Merge branch 'second-header-bug' of github.com:basjan/PHPWord into develop
Update changelog and add sample for bug fix #222