Patch release fixing findR.cmake in cmake builds

findR.cmake should really use the R_HOME to find R-related stuff and that variable should be passed on to cmake via a -D option. The original version tries to find the R executable using findProgram which will not locate R if it is installed in a non-standard location, not on default path.

Version 0.6.3.1

• This release still matches version 0.6.3 of osqp sources
• Fixes a typo that caused a bug in sparse coercion (dgCMatrix in place of dtCMatrix in ensure_dtc_matrix())
• Adds tests to check sparse coercion to be sure

Version 0.6.3

• Sync up to version 0.6.3 of OSQP release
• Fix params.R (issue #18)
• Added time-limit settings parameter per PG's code
• Added check for lower bounds not exceeding upper bounds (issue 29)

v0.6.0.2

R interface to version 0.6.0 of OSQP.

v0.6.0.3

R interface to version 0.6.0 of OSQP.

Fixes a minor bug related to infinite bounds when calling osqp via the R interface.

v0.6.0

Update to support OSQP v0.6.0