Update for cmake to search PYTHON_INCLUDE_DIR path when specified
Merge pull request #276 from onepremise/develop

Update for cmake to search PYTHON_INCLUDE_DIR path when specified
Merge pull request #280 from giact/develop

Fixed a crash in the LLL parser (when you input non-ascii characters); minor GUI tweak.
Fixed a crash in serpent compiler when converting to number a string containing non-ascii character (e.g.: a = "però"). To prevent further signed int overflows: modified intToDecimal() and decimalToInt() into unsignedToDecimal() and decimalToUnsigned() because they currently make sense only on unsigned integers.
Enabled click focus on the "code" text widget, to allow copying the text result of code compilation to clipboard
Added a debug menu option to disable compiler optimization, for testing purposes