CHANGES IN VERSION 1.26.2
-----------------------
    o allow multiple species in prepareProteome
    
CHANGES IN VERSION 1.23.5
-----------------------
    o add dontrun for prepareProteomeByFTP in case there is net connection issue.
    
CHANGES IN VERSION 1.23.4
-----------------------
    o return errors when type of getSequence is not correct.
    
CHANGES IN VERSION 1.23.3
-----------------------
    o Update documentation.
    
CHANGES IN VERSION 1.23.1
-----------------------
    o Add function prepareProteomeByFTP
    o fix the bug in addScheme
    
CHANGES IN VERSION 1.21.4
-----------------------
    o Fix the bug if there are multiple position in one peptides for fetchSequence.
    
CHANGES IN VERSION 1.21.3
-----------------------
    o Update to grImport2
    
CHANGES IN VERSION 1.21.2
-----------------------
    o merge the change by Haibo.

CHANGES IN VERSION 1.21.1
-----------------------
    o documentation generated by RoxygenNote.
    o add function cleanPeptides.
    
CHANGES IN VERSION 1.17.2
-----------------------
    o Fix the bug for formatSequence.R when seq is not character.
    
CHANGES IN VERSION 1.17.1
-----------------------
    o add .globals environment.
    
CHANGES IN VERSION 1.9.3
-----------------------
    o To catch the error when biomaRt server does not response correctly in 
    documentations.

CHANGES IN VERSION 1.9.2
-----------------------
    o change fetchSequence to accept sequences.
    
CHANGES IN VERSION 1.9.1
-----------------------
    o update the test to testthat

CHANGES IN VERSION 1.7.2
-----------------------

NEW FEATURES

    o add html documentation
    
CHANGES IN VERSION 1.7.2
-----------------------

NEW FEATURES

    o customize the x axis as the amino acid physical position
    o update the documentation

BUG FIXES

    o No changes classified as 'bug fixes' (package under active
    development)

CHANGES IN VERSION 1.7.1
-----------------------

NEW FEATURES

    o No changes classified as 'new features' (package under active
    development)

BUG FIXES
    o better layout of the sequence logo.

CHANGES IN VERSION 1.5.1
-----------------------

NEW FEATURES

    o No changes classified as 'new features' (package under active
    development)

BUG FIXES
    o try to catch the error when mart server does not work.

CHANGES IN VERSION 1.3.6
-----------------------

NEW FEATURES

    o add test files for fetchSequence function

BUG FIXES

    o No changes classified as 'bug fixes' (package under active
    development)

CHANGES IN VERSION 1.3.4
-----------------------

NEW FEATURES

    o No changes classified as 'bug fixes' (package under active
    development)

BUG FIXES

    o fetchSequences(): when using proteome object created from AAStringSet, 
    the columns 2 and 3 in the sequences data frame do not contain the expected 
    values.
    o testDAU(): the counts() function returned NA for letters that were missing 
    in a given matrix; that lead to NaNs in the background matrix and to errors 
    during dagLogo() plotting. changed counts() to return 0 for missing letters.
    o fix the typo in dagLogo()

CHANGES IN VERSION 1.3.3
-----------------------

NEW FEATURES

    o add background Noise into test
    o column label relative to the anchor when draw logos

BUG FIXES

    o No changes classified as 'bug fixes' (package under active
    development)
