DB bug fix

totlen & maxlen not initialized in Open_DB
MIT license ...

… added to every file.
Compiler warning clean up

Refactored all codes so that they compile without (or almost without)
warnings under the various versions of the gcc compiler.

Cleaned two benign memory leaks, one benign buffer overflow, and fixed
an undefined variable error in quiva2DB
Benign bug fix in DB.c

Load_Track was not handling fixed annotation tracks correctly.  Since
currently none of the Dazzler programs produce such tracks the problem
was/is benign.
Small bug in DB2fasta

Fixed.