Merge pull request #9 from wajox/feature/improve-test-coverage

Feature/improve test coverage

Merge pull request #8 from wajox/feature/add-filters-builder

add FilterBuilder

fix typo

fix typo

update readme

Merge pull request #7 from wajox/feature/tiny-refactoring-for-methods…

…-naming

rename methods, add Database(), MongoClient() to BaseCollection

Merge pull request #6 from wajox/feature/find-and-update-one

add FindAndUpdateOne()

Merge pull request #5 from wajox/feature/use-time-for-created-update-…

…at-fields

do not update timestamps if they are empty

Merge pull request #4 from wajox/feature/use-time-for-created-update-…

…at-fields

update created_at and update_at fields, use time.Time time for them

Merge pull request #3 from wajox/feature/refactor-package-structure

refactor package structure