Merge pull request #50 from fischel/master

packDateValues
Added ExcelBook::packDateValues() method for generating Excel date value
Update file permissions
fixed return value checks
fixed parameter order
fixed getVerPageBreak, getHorPageBreak methods
Added handling for non-numeric formulas
Added ExcelBook::setPrintArea() method for setting print area
Merge pull request #53 from fischel/master

missing doc and tests
 Added parameter to readRow/readCol/read methods that specifiy whether to parse formula or its value.
Merge branch 'master' of github.com:iliaal/php_excel
fixed compilation with libxl 2.5.4
Added Sheet::setRightToLeft() and Sheet::setRightToLeft() methods that specifies whether the sheet in is "right to left" display mode
Added Book::isTemplate() and Book::setTemplate() methods for detecting xltx files and converting from xlsx to xltx and vice versa
make _php_excel_date_unpack return long instead of int. This fixes a bug with dates > 2038
added testcase for dateunpack_overflow bug
Merge pull request #59 from ederuiter/master

Fix for overflow in _php_excel_date_unpack due to int return type instead of long
change to long
 fixed typo
Added excel.skip_empty INI setting that allows null values to be skipped, if set to 2 the empty strings will be skipped as well
update license