Merge pull request #13 from agbeltran/master

Additions for the next version
Merge pull request #14 from agbeltran/master

Addition of AssayTab class and subclasses, completed documentation, methods for building objects required for MS and microarray processing
Merge pull request #15 from agbeltran/master

Fix
Merge pull request #16 from agbeltran/master

Fixed example
Merge pull request #17 from agbeltran/master

Documentation update
Merge pull request #19 from agbeltran/master

Fixed bug on factors definition
Merge pull request #20 from agbeltran/master

Fixing issues related to the assay.filenames.per.sample definition.
Merge pull request #21 from agbeltran/master

Version 1.3.2 and new date
Merge pull request #22 from agbeltran/master

Adding citation file
anchor filename regular expression i_ to beginning of String, closes #23
Merge pull request #24 from sneumann/patch-1

anchor filename regular expression i_ to beginning of String, closes #23
Added changes for this version
Bumped version number
Merge branch 'master' of https://github.com/agbeltran/Risa