Add readme
Add .gitignore
Add interface of ADT Log
Add ADT String operations
Add ADT Error operations
Add ADT Temporal
Add ADT log implementation
FIX: Add destroy string in function "error_show"
Change datatype for indicate if is active console mode in constructor
Add example for use ADT Log
Add new files to ignore
Fix leaks in log.c and temporal.c

* No closed file
* No free program name
* No free time in creation line to logging
* Bad calculate length for dates
Add new line in example, because formatting source code.
Change interface of string_append(...)

Change function for recive a pointer to t_string and modified old pointer, now no need assign a new pointer in variable.
Fix: string_equals_ignore_case(...)

Incorrect return value when a string is equal
Fix author in example-log
Add examples for ADT String
Add new operation and change name a old operation in ADT String 

* Add operation string_new(..), create a string with 255 characters.
* Fix name string_new(aString) to string_duplicate(aString).
Change directory structure
Adapt examples to the new directory structure