* Add Modulo operation for getting the quotient

* Improved modulo tests and implementation.

* Removed assertion.

* Made ERC721.exists internal.

* Removed exists ERC165 identifiers

used dos2unix program

* Moving towards chai.should.

* Fixed failing tests.

* Fixed linter errors.

* Revert package-lock.json changes.

* Fixed failing tests.

* s/eq/equal

* Addressed review comment

* feat: use require in SafeMath

* fix: grammar with revert

* Deploy the contract with the designated owner

* Fixed TX origin.

Use 2 ^ 256 - 1 instead that huge constant value.

This is a minor change, aligning to the same convention used in the other contracts.

* SplitPayment now requires payees.

* Improved test phrasing.

* reentrancy mutex gas optimization

* 1) uint => uint256 2) ++ to += 1

* remove Math.min64 and Math.max64

* refactor Math tests to use return values

* enhance Math coverage

* Consolidted ERC20 Interface and Implementation Files

* Fixed CanReclaimToken's tests to use StandardTokenMock instead of BasicTokenMock

* Changed token's variable type in TokenTimelock to ERC20

* Merged the StandardBurnableToken with BurnableToken since it now inherits from StandardToken; Fixed TokenTimelock so it uses SafeERC20 for ERC20

* Fixed variable type for _token in TokenTimelock constructor

* Fixed linting warning in BurnableToken

* Added back burnFrom tests.

* Changed Crowdsale inheritance order.

* Changed FinalizableCrowdsale inheritance order.

(cherry picked from commit 3d86c58d)

* Changed Crowdsale inheritance order.

* Changed FinalizableCrowdsale inheritance order.

* All tests now use account names, and dont use accounts[0] (except ERC721)

* Added account names to some missing contracts.

* Add an initial document for our code style

* Remove abbreviations from parameters

* Rename the param in AddressUtils

* fix comment

* Add an initial document for our release process

* add more detail and explanation to releasing guide

* fix details of the RELEASING.md document

* Update RELEASING.md

* Update RELEASING.md

* Update RELEASING.md

* Update RELEASING.md

* Add an initial document for our code style

* add parameter types

* fixed visibility warnings

* solved visibility and line length warning

* change a test assertion that fails due to chai dependence update

* linter, constructor style and solved visibility warnings

* Changed Windows line endings to Unix.