edited docs
improved the efficiency of new test generators.
fixed negative int overflow
updated foralls own test.
added tests for typed-vector
started fixing na handling for typed vector
updated as_typed_vector and its tests.
updated test
updated na tests
fixed syntax error in typed vector tests.g
all as-typed-vector tests are passing.
fixed a test broken by new NA handling
updated test
fixed missing function.
got example checking working
fixed accidentically deleted xMap_ method
fixed use of internal function in test
removed xMapply
removed use of xMapply in xList
fixed chunk example.