Merge pull request #73 from johmue/master

added read_formula hints for ExcelSheet::read(), ExcelSheet::readCol() and ExcelSheet::readRow()
Merge pull request #74 from johmue/master

updated php documentation classes and minor changes in excel.c for Reflection API
minor fixes for Reflection API updated inline comments
added new libxl 3.6.0 methods ExcelSheet::hyperlinkSize(), ExcelSheet::hyperlink(), ExcelSheet::delHyperlink(), ExcelSheet::addHyperlink(), ExcelSheet::mergeSize(), ExcelSheet::merge(), ExcelSheet::delMergeByIndex(), ExcelSheet::splitInfo()