Support BOOL/INT1 data type

[deyuan]

• Add PIM_BOOL data type into the list
• Update pimCmd code to support some operations (and, or, xor), get name, etc.
• reduction sum: in pimCmd, just get the correct result. In perf params, we need to model V/H differently. For V, it's a row-wide pop count. For H, it's a typical reduction.
• Create a test function

Can be done later:

• Before we have H layout associative padding, we can only allocate PIM_BOOL objects without padding. Once the padding is supported, we can support mixed data types.
• Type conversion - we may need to define APIs and measure performance, how each architecture can support it

Related to:
Issue #83
Discussion #92