Adrien Loison 21263a0730 Add support for styling
Added top level methods on the Writer:
 - addRowWithStyle()
 - addRowsWithStyle()

Added a style builder, to easily create new styles.
Each writer can specify its own default style and all styles will automatically inherit from it.

For now, the style properties supported are:
 - bold
 - italic
 - underline
 - strikethrough
 - font size
 - font name
 - wrap text (alignment)
2015-08-07 20:39:17 -07:00
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2015-08-07 20:39:17 -07:00