Added a module to parse logical equations and convert it to BinPy compatible Gate level functional statements
Converted the implementation of connections from list to dict
Added PowerSource() and Ground() classes with documentation.
Added an example of using PowerSource() and Ground()
Added tests for PowerSource and Ground
Corrected a few bugs
Fixed a typo
Made changes to the gates.py file to add a parent class for multiple input gates.
Merge pull request #108 from petermlm/develop

Made changes to gates.py file to add a parent class for multiple input gates.
Merge pull request #107 from rajat974/GExamples

Examples Added
Implemented functionality to convert minterms to boolean function
Also converts boolean function to 'Implementable Form' - see ConvertExpression
ImplementBooleanFunction also implemented
constructor corrected
Added ExpressionConvert example
fixed makeCompatible() in ExpressionConvert.py also.
Merge branch 'develop' of https://github.com/BinPy/BinPy into algos
adds ICs 4000, 4001, 4002, 4011, 4012, 4023, 4025, 4068, 4069, 4070, 4071, 4072, 4073, 4075, 4077, 4078, 4081 and 4082
adds tests for 4000, 4001, 4002, 4011, 4012, 4023, 4025, 4068, 4069, 4070, 4071, 4072, 4073, 4075, 4077, 4078, 4081, 4082
adds example files for 4000 series ICs
adds series_4000_test.py to .travis.yml
edits README.md to add series 4000 ICs
Merge branch 'develop' of https://github.com/BinPy/BinPy into sources