Conceal links in agenda view. Closes #358

Author: kristijanhusak

syntax/orgagenda.vim

@@ -1,7 +1,14 @@
 lua require('orgmode.colors.highlights').define_agenda_colors()
 syn match OrgAgendaDay /^\S\+\s\+\d\+\s\S\+\s\d\d\d\d$/
 syn match OrgAgendaTags /:[^ ]*:$/
+syn match org_hyperlink	"\[\{2}[^][]*\(\]\[[^][]*\)\?\]\{2}" contains=org_hyperlinkBracketsLeft,org_hyperlinkURL,org_hyperlinkBracketsRight
+syn match org_hyperlinkBracketsLeft	contained "\[\{2}"     conceal
+syn match org_hyperlinkURL				    contained "[^][]*\]\[" conceal
+syn match org_hyperlinkBracketsRight	contained "\]\{2}"     conceal
+
 hi OrgBold gui=bold cterm=bold
 hi OrgUnderline gui=underline cterm=underline
 hi default link OrgAgendaDay Statement
 hi default link OrgAgendaTags OrgBold
+
+hi default link org_hyperlink Underlined