Bug fixes. Refactoring and update cytology. Insert examination_time.
Delete cytology was implemented.
Delete biopsy was implemented.
Delete freezing was implemented.
Bug fixes: not exist examination_time.
Delete necropsy was implemented.
New interface implement. Partial refactoring code. Bug fixes
Visualization immunohistochemical implemented.
Immunohistochemical updated: delete immunohistochemical implemented and bug fixes.
Unit Test cytology was reimplemented.
Unit Test freezing was implemented.
Merge branch 'updates' into devel