Update readme, fix typos

Author: caetera

MainClass.cs

@@ -413,7 +413,7 @@ private static void RegularParametersParsing(string[] args)
                 },
                 {
                     "a|allDetectors",
-                    "Extract additonal detector data: UV/PDA etc",
+                    "Extract additional detector data: UV/PDA etc",
                     v => parseInput.AllDetectors = v != null
                 },
                 {
@@ -426,12 +426,12 @@ private static void RegularParametersParsing(string[] args)
                 },
                 {
                     "L=|msLevel=",
-                    "MS Levels (i.e. MS1, MS2 etc) to include in the output, should be comma separated list of integers ( 1,2,3 ) or intervals ( 1-3 ), open end intervals ( 1- ) are allowed",
+                    "Select MS levels (MS1, MS2, etc) included in the output, should be a comma-separated list of integers ( 1,2,3 ) and/or intervals ( 1-3 ), open-end intervals ( 1- ) are allowed",
                     v => parseInput.MsLevel = ParseMsLevel(v)
                 },
                 {
                     "P|mgfPrecursor",
-                    "Write precursor scan in MGF file",
+                    "Include precursor scan number in MGF file TITLE",
                     v => parseInput.MGFPrecursor = v != null
                 },
                 {

README.md

@@ -76,6 +76,11 @@ optional subcommands are xic|query (use [subcommand] -h for more info]):
                                verbose.
   -e, --ignoreInstrumentErrors
                              Ignore missing properties by the instrument.
+  -L, --msLevel=VALUE        Select MS levels (MS1, MS2, etc) included in the
+                               output, should be a comma-separated list of
+                               integers ( 1,2,3 ) and/or intervals ( 1-3 ),
+                               open-end intervals ( 1- ) are allowed
+  -P, --mgfPrecursor         Include precursor scan number in MGF file TITLE
   -u, --s3_url[=VALUE]       Optional property to write directly the data into
                                S3 Storage.
   -k, --s3_accesskeyid[=VALUE]