undocumented BYTSCL accepting three parameters (value,min,max)
initial import for SPL_INIT() and SPL_INTERP()
g++ 4.3 compatibility
ignore something like a=(a=a) (so it is allowed even if a is undefined)
accept self assignment of undefined variables
fixed print, ', ', FORMAT='(A)'
Add SUBEXPR keyword support for STREGEX
Add S_FUNCTIONS/S_PROCEDURES keywords for ROUTINE_NAMES
in MEDIAN(), managing "width" parameter
precalculation for (selected) constant parmeter functions. 
precalculation for constant arrays composed of constant expressions
precalculation for constant expressions and constant arrays, a major improvement
speedup for constant arrays
add FILL and NLEVELS for CONTOUR
Initial import of RK4
initial import of codes for function VOIGT
initial import of function REAL_PART in GDL syntax
allow floats without exponent number like 1e
FACTORIAL correcting bug when inputs are Integers; managing arrays
Made for READ_ASCII DATA_START independent of HEADER
