Update website documentation according to 0.3 features

[bguerout]

No description provided.

[bguerout]

Jongo can use regular expressions with $regex:'.*jo' syntax and Pattern.compile() method.
This has to be documented.

@Test
public void patternParameters() throws Exception {
    collection.save(new Friend("john"));
    Friend john = collection.findOne("{name:#}", Pattern.compile("jo.*")).as(Friend.class);
    assertThat(john).isNotNull();
}

@Test
public void regexWithinParams() throws Exception {
    collection.save(new Friend("john")); 
    Friend john = collection.findOne("{name: {$regex: #}}", "jo.*").as(Friend.class); 
    assertThat(john).isNotNull();
}

Sadly, /myquery/ syntax is not supported by the driver yet. So does Jongo.

[yamsellem]

Exposing Jongo objects through a a web service will be improved by Jongo .3 in several ways:
— @Id will help removing ObjectId from Jongo objects
— @JsonView support will help to filter attributes on marshalling and unmarshalling
— a JerseyFilter is still provided in the rare case where ObjectId must be used: https://github.com/yamsellem/jongo-jersey

Those options must be documented.

[yamsellem]

Performance improvements of .3 must be documented.

[yamsellem]

MapperModifier + Provider must be documented. A introduction to building a custom Provider could be helpful.

[yamsellem]

Release notes 0.2→0.3 must added.

[yamsellem]

A page with versions history must be created.

[yamsellem]

Every pojo attributes is mapped by default by Jongo, so documentation should introduce @JsonIgnore, the default way to exclude attribute from (un)marshalling.