Added doc-strings
Version 1.1-beta
Added keyword arugment imports to Benchmark that takes a string of import statements.
Changed class method benchmarking example.
Examples: Removed global_local_imports.py and added list_comprehension.py which demonstrates import argument.
fix: stmt string when function has no args or kwargs.
Removed printing of summary in ClassBenchmark.
fs argument in ComparisonBenchmark.summarize accepts filename as string