Added comment to EasyRdf_Exception to make PHP CodeSniffer happy
PSR2: added space on either side of equals sign for default values in function arguments
PSR2: indentation corrections
PSR2: removed blank line before class closing brace
PSR2: fixes to whitespace inside function arguments
Codestyle
PSR2: corrected multiline argument list
"Argument lists MAY be split across multiple lines, where each subsequent line is indented once. When doing so, the first item in the list MUST be on the next line, and there MUST be only one argument per line."
PSR2: removed underscores from method names
"Method names SHOULD NOT be prefixed with a single underscore to indicate protected or private visibility."
PSR2: changed else if to elseif
"The keyword elseif SHOULD be used instead of else if so that all control keywords look like single words."
PSR2: removed underscores from the start of a property names
"Property names SHOULD NOT be prefixed with a single underscore to indicate protected or private visibility."
PSR2: removed inline control structures
"The body of each structure MUST be enclosed by braces."
Changed phpcs to check for the PSR2 code style.
Removed the 'check-whitespace' rule from the Makefile - this is now done by phpcs