CRAN version

• isotope selection improved to get rid of 1&2 issue
• fix top issue in getsda
• fix peak index issue in getcluster
• add corcutoff for getpmd
• speed up GlobalStd by mapply
• add message for getrda
• add hmdb pmd analysis results as dataset
• add digits for mass accuracy
• fix the ms1 larger issue in getpmd
• add correlationship in getpmd
• add support for quantitative paired peaks list selection for specific reaction
• add support for target pmd and compound analysis for reaction chain
• update vignettes
• change default ng value into auto-detection
• add top option to limit sda output
• add suport for GlobalStd based targeted analysis
• add suport to extract specific pmd across different retention time groups
• add PCA similarity factor function from EvolQG package
• add support to export std peaks based on correlation within retention time group
• add support to export index for peaks with highest intensity in peaks cluster
• add support to use intensity data to refine GlobalStd results
• add support to generate sda analysis for mass list only #5
• remove multi chargers with a strict rule #4
• add parameter selection part in vignette #3
• add support for peaks cluster output #2
• add support for formula generation in enviGCMS package #1