Fixes:
1. A bug was found in BEND with nonzero K1 when momentum changes, in tracking, emit, and CALC. This bug was generated in V1.1.6.16.3k64, on Nov. 19, 2019.

2. A bug in Insert has been found by Haoyu Shi. Insert[a, b, n] failed when n == Length[a].

3. Tracking in BENDs with F1,FB2,FB2 for nonzero K1 or ANGLE=0.

Changes:
1. Minor changes in tkrad & tkradf1: declarations of intent.

2. Changed the handling of carriage return to be more compatible with the DOS format.

3. gs now sets LD_LIBRARY_PATH to avoid confusion of libraries such as TclTk.

4. Avoid circular dependences.