rsconnect installation failure - r

I've tried for ages to install 'rsconnect' with the command
devtools::install_github('rstudio/shinyapps')
but failed with the message below.
Downloading GitHub repo rstudio/shinyapps#master
from URL https://api.github.com/repos/rstudio/shinyapps/zipball/master
Installing shinyapps
"C:/Program Files/R/R-3.2.3/bin/x64/R" --no-site-file --no-environ --no-save --no-restore CMD INSTALL \
"C:/Users/Flora/AppData/Local/Temp/RtmpsPtNWD/devtools20343ed16b87/rstudio-shinyapps-4dd3a9d" --library="C:/Program \
Files/R/R-3.2.3/library" --install-tests
Error: Command failed (1)
I've tried
devtools::install_github('rstudio/shinyapps')
also, but failed with the exactly same message.
Can anybody help me with this please?
Many thanks in advance! :)

Try this -
if (!require("devtools"))
install.packages("devtools")
devtools::install_github("rstudio/rsconnect")

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and now has_devel returns TRUE :O :D
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"C:\Program" ­Ҝ пү«пҜвбп ү­гваҜ­­Ҝ© Ё«Ё ү­Ҝи­Ҝ©
Ө®¬ ­¤®©, ЁбÜ®«­пҜ¬®© Üа®Ҹа ¬¬®© Ё«Ё Ü ӨҜв­л¬ д ©«®¬.
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It seems, your error is :
'C:\Program' is not recognized as an internal or external command,
operable program or batch file. Error: Command failed (1)
It happens due to the space character in location path (C:\Program Files) path. According to the documentation,
If you want to be able to build packages from sources, we recommend that you choose an
installation path not containing spaces.
Please refer the link : How do I install R for Windows?
Try changing the installation location. Then it should work fine.

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