Mentions bob.bio.vein on bob.bio.base docs (closes #104)

Closes #104

See merge request !133

Add annotator support

See merge request !131

This reverts commit 3fdb09c9.

Add missing test dependencies

See merge request !132

Use super in base file classes

See merge request !127

Fixed the exception that is raised when score file is not found

See merge request !124

Fix debug message (closes #103)

Closes #103

See merge request !123

chain loading: following not preceding config file

See merge request !121

Integrate the new bob.extension loading config mechanism

See merge request !119

# Conflicts:
#   bob/bio/base/tools/command_line.py

Removed global variable results

Using config file loading mechanism from bob.extension

Used the bob.extension config file loading

Removing an awesome feature implemented in 2 lines of code

Integrated with bob.extension merge 58

[sphinx] Added some documentation about chain loading

Fixed import

Enabled the assignment of the variable env via config files

See merge request !120