Full repelemM support

[aminya]

Now repelemM(V, count) where V is a vector and count is a scalar is supported.
Full support will be added when the following pull request is merged to Julia:
JuliaLang/julia#29560

Different tasks of this to do plan:

1. Helping Pass vector of lengths to repeat; close #16443 JuliaLang/julia#29560 to be merged to Julia
2. Adding all needed methods to fully support repelemM(V, count)

Achievement check:

mRepelem1 = repelemM([1 2 3 4], 3) 

# should give:
[1 1 1 2 2 2 3 3 3 4 4 4]


mRepelem2 = repelemM([1 2 3 4], (3,2,1,1)) 

# should give:
[1 1 1 2 2 3 4]


mRepelem3 = repelemM([1 2; 3 4], 3, 2) 

# should give:
 [ 1     1     2     2 ;
   1     1     2     2 ;
   1     1     2     2 ;
   3     3     4     4 ;
   3     3     4     4 ;
   3     3     4     4 ]

mRepelem4=repelemM([1 2; 3 4],1,[2 3])

# should give:

[1     1     2     2     2;
 3     3     4     4     4]