sort-bed: fixed issue that broke --max-mem with large #s of distinct chromosomes.  also cleaned up some memory leak problems
updated suite version info to 2.4.0
small changes to return types
updated usage statement
updated usage statement
updated version numbers in docs
--max-mem work with millions of distinct 'chromosome' names
speeding up cases where there are a ton of distinct chrom names with --max-mem option.  still much testing to do and unclear how it will effect 'normal' operations.  looking good so far
added casts and conditional inlude for LLVM/Clang compilation
modified conditional include for LLVM/Clang compilation
modified conditional include for LLVM/Clang compilation
applied static casts from GCC warnings
updated sort-bed test script
testing more efficient script
testing more efficient script
fixed script
removed recently added bug feature - array access issue
updated upper limit on sort-bed test script
added hierarchial merge-sort to manage max # open file descriptors in worst case scenarios
updated comments