uninitialized variable c, d
unused variable f
makeing nta::Real Epsilon a "const" silences the "is not used and will not be emitted" warning
fix error (warning): (bool) checksSSE() vs (int) checkSSE()

this was issued as a warning, but actually is an error:
bool!=-1 is always false ---> SSE speedup did not work,
will be working now again!
fix warning 'unsequencedmodification and access to "k"'

this is a bad practice and has undefined behavior
fix warning Wtautological-compare UInt < 0

Index& uses only UInt values, the <0 comparison is useless
fix spatial_pooler.cpp does not set provided random seed

spotted as warning:tautological-compare UInt < 0
- we want to take the seed if > 0 , and get rand() if set < 0
remove unused private field
remove tautological-compares
fixme note
fileFormat changed to UInt32, reflect here too
ask note
make nta::Epsilon const, remove setGlobalEpsilon()

and unused class ZeroEpsilon
Merge branch 'master' into clang-warnings
Warning: sp.avgConnectedSpanForColumn2D_ returns a Real

dont cast to UInt
fix VectorFileSensor::seek

was supposted to act as a circular buffer, does so now.
Revert "Warning: sp.avgConnectedSpanForColumn2D_ returns a Real"

This reverts commit 3e9d140423f7aebeca286186c9e4f0bca85700f8.
makes tests fail, investigate later
Merge branch 'master' into clang-warnings
fix VectorFileSensor, passes (newly) added tests
Merge branch 'master' into clang-warnings