Broote

- Added tests for runner classes.
- Fixed on runner classes(detected from tests)

Runner 'compare_func' argument -> 'comparer'

Fixed 'record_transformer' argument and Updated README.md

- README.md was updated as it contained bugs on examples and it was outdated.
- 'record_tranformer' was changed to 'record_transformer'(spell error fix)

Bug fix, defined package '\_\_all\_\_' and create exceptions.py

- Bug fix that caused raised exception when session is passed direcly was fixed(10)
- Package level '\_\_all\_\_' attribute was defined to only import certain namespace attributes(9)
- exceptions.py was added which also imports all forcetable exception classes(11)