Check all parts of a  concatenated echo statement, ignore function arguments within echo statements.
Relates to #33
Extend XSS check to _xx functions family
Closes #33
Flag direct database queries, check for caching functions
Closes #69

Add warning for wpdb calls where caching functions are used within same scope
Add error for wpdb calls if no caching functions are present
Explain outcome of unit test lines
Remove extra lines
Fix the check for caching functions
Add check for database schema changes. Closes #70
Fix multiple notices for same message/same line.
Fix unit test php short tag, causing Travis to fail.
Fix php short tag causing Travis to fail.
Flag any non-validated/sanitized super global input vars.
Closes #72
Switch list of sanitizing/autoescaping function to a static var to be used by other classes
Disallow use of PHP sessions.
Closes #75
Rename classes to allow for a second sniff targeting same issue
Add sniff to check for usage of $_SESSION var
Flag manipulation of server (default) timezone
Closes #76
Flag removal of admin bar
Closes #77
Flag usage of input vars, closes #79
Add test for nested functions inside of escaping function
Add unit test for failure to use wp_cache_set
Fix detection of closing parenthesis of functions
Use addError native string formatting.