fix can't resolve rebar version problem; fix sdk string mismatching

[yidayoung]

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fix #903
like issue said can't resolve rebar version problem on windows, seems just should use escript.getStdOut() not rebar.getStdOut()

intellij-erlang/src/org/intellij/erlang/rebar/settings/RebarConfigurationForm.java

Lines 97 to 98 in 8eb5f46

	ExtProcessUtil.ExtProcessOutput escript = ExtProcessUtil.execAndGetFirstLine(3000, escriptPath, rebarPath, "--version");
	String versionWithEscript = rebar.getStdOut();

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after this comit 0dfb40e[simplify visible erlang sdk name]
should also change patten

intellij-erlang/src/org/intellij/erlang/sdk/ErlangSdkRelease.java

Line 34 in 0dfb40e

private static final Pattern VERSION_PATTERN = Pattern.compile("Erlang/OTP (\\S+) \\[erts-(\\S+)]");

intellij-erlang/src/org/intellij/erlang/sdk/ErlangSdkRelease.java

Lines 63 to 64 in 0dfb40e

	public String toString() {
	return "OTP " + getOtpRelease() + ", erts-" + getErtsVersion();

or ErlangSdkType.detectSdkVersion will always call erl, but not all time can use OSProcessHandler, it will make error ERROR - ution.process.OSProcessHandler - Synchronous execution on EDT

[kvakvs]

OTP version can be read from SdkRoot/releases/xx/OTP_VERSION and ERTS version can be found from SdkRoot/erts-xxx directory name. I will soon create a merge request for that and also will look at this code here