clip-crypto: fixed signedness warnings
clip-crypto: Add SHA1 and SHA1_FILE functions
	SHA1( <cData> ) -> SHA1 cData digest
	SHA1_FILE( <cFile> ) -> SHA1 cFile digest
Documentation:
	Add SHA1 and SHA1_FILE function at DocBook files.
Repository cleanup:
	 Created .gitignore files in doc/
	 Ignored some autogenerated files and directory