allow for custom executable
Merge pull request #84 from mdlerch/general_global

allow for custom executable
Update the global_r_plugin.vim usage.
Avoid E341 (Internal error: lalloc(0, )).
The E341 was happening with filetypes that include R (Rnoweb, Rmd, Rrst,
Rhelp, and Rdoc) if the user had quickly sent to R two commands that
load libraries. The second command sent to R would make the Vim-R-plugin
run the Vim filetype command again before the first one has been
processed.
Require Vim >= 7.4 to run the Vim-R-plugin.
Delete old no longer needed code.
Do syntax sync on beginning of "Examples" section.
Highlight R code in "Usage" section.
Don't try to highlight functions of "datasets".
Open pdf only once if vimrplugin_openpdf = 1.
Now, the values of vimrplugin_openpdf mean:
0 = Don't open the pdf.
1 = Open only once (the first time that pdflatex is run).
2 = Always open the pdf.
Do "syn sync" command in Rdoc.
Update: the next release will be 1.0.
add SendLineToRAndInsertOutput
Merge pull request #85 from sgibb/SendAndInsert

add function to send current line to R and write its output into the line below
Change SendLineToRAndInsertOutput shortcut to \o.
Avoid "modifiable is off" error in rdoc.