iASL: Add error handling to the internal get file size function.

Adds error checking and handling to the get file size function.
ACPICA BZ 1050.
Unix makefiles: Add a few new compile time warning options.

Some additional gcc 4+ warnings are now enabled.
Documents: Update for new features.

Version 20140214.
Logfile: Changes for version 20140214.

Version 20140214.
Update version to 20140214.

Version 20140214.